dcsimg

Lifespan, longevity, and ageing

provided by AnAge articles
Maximum longevity: 23.2 years (wild)
license
cc-by-3.0
copyright
Joao Pedro de Magalhaes
editor
de Magalhaes, J. P.
partner site
AnAge articles

Status in Egypt

provided by Bibliotheca Alexandrina LifeDesk

Accidental visitor.

license
cc-by-nc-sa-3.0
copyright
Bibliotheca Alexandrina
author
BA Cultnat
provider
Bibliotheca Alexandrina

Anas discors

provided by DC Birds Brief Summaries

Like all teals, the Blue-winged Teal is smaller than most ducks (15-16 inches). The male is easily identified by the large, crescent-shaped white patches on the sides of its head and by its specked breast and sides. Like many male ducks, the male Blue-winged Teal takes on an ‘eclipse’ plumage in fall and early winter that is drab-brown overall and resembles the plumage of female and juvenile Blue-winged Teals. Both sexes have large blue patches on the wings. Blue-winged Teals breed across the United States and Canada, although somewhat further south than many related duck species. In summer, this species may be found from southern Alaska across to southeastern Canada south to the Mid-Atlantic region, the Ohio River Valley, the southern Great Plains, and in the mountain west. Blue-winged Teals also migrate further south than most North American ducks, wintering along the southern Atlantic and Pacific, and Gulf coasts, in Florida, in Texas, and south into Mexico, Central America, and the West Indies. In summer, Blue-winged Teals breed in small ponds with plentiful insects, larvae, mollusks, and crustaceans, all of which feature highly in this duck’s diet during the breeding season. In winter, this species may be found on mudflats and in fresh and brackish marshes. In the tropics, Blue-winged Teals may also be found in saltwater wetlands dominated by mangroves. Blue-winged Teals may be seen either on land or in the water, where they may be observed foraging for food. This species may also be observed undertaking straight, swift flights on migration or between breeding or foraging grounds. Blue-winged Teals are most active during the day.

Threat Status: Least Concern

license
cc-by-nc-sa-3.0
copyright
Smithsonian Institution
author
Reid Rumelt

Associated Plant Communities

provided by Fire Effects Information System Animals
More info for the term: forest

The blue-winged teal is primarily found in the northern prairies and
parklands. It is the most abundant duck in the mixed-grass prairies of
the Dakotas and the prairie provinces of Canada. The blue-winged teal
is also found in wetlands of boreal forest associations, shortgrass
prairies, tallgrass prairies, and deciduous woodlands [1].

This duck commonly inhabits wetland communities dominated by bulrush
(Scirpus spp.), cattail (Typha spp.), pondweed (Potamogeton spp.),
sedges (Carex spp.), widgeongrass (Ruppia maritima), and other emergent
and aquatic vegetation [1,2,8,17]. During molting, it often remains
among extensive beds of bulrushes and cattails. The blue-winged teal
favors areas dominated by bluegrass (Poa spp.) for nesting. Hayfields
and plant communities of buckbrush (Ceonothus cuneatus) and sedges are
also important as nest sites [1]. In the winter, blue-winged teal often
inhabits mangrove (Rhizophora spp.) swamps [14].


REFERENCES :
NO-ENTRY
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Common Names

provided by Fire Effects Information System Animals
blue-winged teal
bluewing
summer teal
white-faced teal
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Cover Requirements

provided by Fire Effects Information System Animals
More info for the term: cover

Blue-winged teal often use heavy growth of bulrushes and cattails as
escape cover [2]. Grasses, sedges, and hayfields provide nesting cover
for these ducks [6]. Fritzell [6] reported that blue-winged teal nests
located in light to sparse cover were more successful than those in
heavy cover. Nesting success was 47 percent on grazed areas and 14
percent on ungrazed areas [6].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Distribution

provided by Fire Effects Information System Animals
The blue-winged teal breeds from east-central Alaska and southern
Mackenzie District east to southern Quebec and southwestern
Newfoundland. In the contiguous United States it breeds from northeast
California east to central Louisiana, central Tennessee, and the
Atlantic Coast [4,10]. The western blue-winged teal inhabits that part
of the breeding range west of the Appalachian Mountains. The Atlantic
blue-winged teal nests along the Atlantic Coast from New Brunswick to
Pea Island, North Carolina [1].

The blue-winged teal winters from southern California to western and
southern Texas, the Gulf Coast to the Atlantic Coast and south to
Central and South America. It is often seen wintering as far south as
Brazil and central Chile [4,11,16].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Food Habits

provided by Fire Effects Information System Animals
Blue-winged teal are surface feeders and prefer to feed on mud flats, in
fields, or in shallow water where there is floating and shallowly
submerged vegetation plus abundant small aquatic animal life. They
mostly eat vegetative matter consisting of seeds or stems and leaves of
sedge, grass, pondweed, smartweed (Polygonum spp.), duckweed (Lemna
spp.), widgeongrass, and muskgrass (Chara spp.) [1,4,10]. The seeds of
plants that grow on mud flats, such as nutgrass (Cyperus spp.),
smartweed, millet (Panicum spp.), and rice cut-grass (Leersia
oryzoides), are avidly consumed by this duck [1]. One-fourth of the
food consumed by blue-winged teals is animal matter such as mollusks,
crustaceans, and insects [1,4,10].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Habitat-related Fire Effects

provided by Fire Effects Information System Animals
More info for the terms: cover, marsh

Fire can remove blue-winged teal nesting cover [19]. Although
blue-winged teal do not show a preference for burned cover, they use
burned areas more often than do other dabbling ducks [6]. Fritzell [6]
found 16 of 19 nests in burned areas to be those of blue-winged teal.
Large-scale autumn burning may have a detrimental effect on marshes by
reducing their ability to catch and retain drifting snow, which adds
heavily to spring run-off. The ability of marsh vegetation to catch and
hold snow can be vital to marsh survival [19]. Fire often removes
excessive accumulations of fast-growing hydrophytes, permitting better
waterfowl access and growth of more desirable duck foods. Fire can be
used to convert forested uplands adjacent to aquatic habitats to grasses
and sedges, thus increasing the nesting potential for some waterfowl
[18].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Habitat: Cover Types

provided by Fire Effects Information System Animals
More info on this topic.

This species is known to occur in association with the following cover types (as classified by the Society of American Foresters):

More info for the term: swamp

5 Balsam fir
12 Black spruce
13 Black spruce - tamarack
16 Aspen
17 Pin cherry
18 Paper birch
19 Gray birch - red maple
38 Tamarack
63 Cottonwood
88 Willow oak - water oak - diamondleaf oak
89 Live oak
91 Swamp chestnut oak - cherrybark oak
95 Black willow
106 Mangrove
201 White spruce
202 White spruce - paper birch
203 Balsam poplar
204 Black spruce
205 Mountain hemlock
206 Engelmann spruce - subalpine fir
217 Aspen
235 Cottonwood - willow
253 Black spruce - white spruce
254 Black spruce - paper birch
252 Paper birch
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Habitat: Ecosystem

provided by Fire Effects Information System Animals
More info on this topic.

This species is known to occur in the following ecosystem types (as named by the U.S. Forest Service in their Forest and Range Ecosystem [FRES] Type classification):

More info for the term: shrub

FRES11 Spruce-fir
FRES14 Oak-pine
FRES15 Oak-hickory
FRES17 Elm-ash-cottonwood
FRES18 Maple-beech-birch
FRES19 Aspen-birch
FRES20 Douglas-fir
FRES21 Ponderosa pine
FRES22 Western white pine
FRES23 Fir-spruce
FRES24 Hemlock-Sitka spruce
FRES26 Lodgepole pine
FRES34 Chaparral-mountain shrub
FRES36 Mountain grasslands
FRES37 Mountain meadows
FRES38 Plains grasslands
FRES39 Prairie
FRES41 Wet grasslands
FRES42 Annual grasslands
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Habitat: Plant Associations

provided by Fire Effects Information System Animals
More info on this topic.

This species is known to occur in association with the following plant community types (as classified by Küchler 1964):

More info for the terms: bog, forest

K001 Spruce - cedar - hemlock forest
K002 Cedar - hemlock - Douglas-fir forest
K003 Silver fir - Douglas-fir forest
K004 Fir - hemlock forest
K005 Mixed conifer forest
K008 Lodgepole pine - subalpine forest
K013 Cedar - hemlock - pine forest
K025 Alder - ash forest
K029 California mixed evergreen forest
K033 Chaparral
K034 Montane chaparral
K047 Fescue - oatgrass
K048 California steppe
K049 Tule marshes
K050 Fescue - wheatgrass
K051 Wheatgrass - bluegrass
K053 Grama - galleta steppe
K054 Grama - tobosa prairie
K056 Wheatgrass - needlegrass shrubsteppe
K057 Galleta - three-awn shrubsteppe
K058 Grama - tobosa shrubsteppe
K063 Foothills prairie
K064 Grama - needlegrass - wheatgrass
K065 Grama - buffalograss
K066 Wheatgrass - needlegrass
K067 Wheatgrass - bluestem - needlegrass
K068 Wheatgrass - grama - buffalograss
K069 Bluestem - grama prairie
K070 Sandsage - bluestem prairie
K072 Sea oats prairie
K073 Northern cordgrass prairie
K074 Bluestem prairie
K075 Nebraska Sandhills prairie
K076 Blackland prairie
K077 Bluestem - sacahuista prairie
K078 Southern cordgrass prairie
K079 Palmetto prairie
K080 Marl - everglades
K081 Oak savanna
K082 Mosaic of K074 and K100
K088 Fayette prairie
K090 Live oak - sea oats
K091 Cypress savanna
K092 Everglades
K093 Great Lakes spruce - fir forest
K094 Conifer bog
K095 Great Lakes pine forest
K096 Northeastern spruce - fir forest
K097 Southeastern spruce - fir forest
K098 Northern floodplain forest
K100 Oak - hickory forest
K105 Mangrove
K107 Northern hardwoods - fir forest
K108 Northern hardwoods - spruce forest
K109 Transition between K104 and K106
K110 Northeastern oak - pine forest
K111 Oak - hickory - pine forest
K113 Southern floodplain forest
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Management Considerations

provided by Fire Effects Information System Animals
Farm activities such as mowing of hayfields, plowing, fence-building,
and trampling by cattle can destroy blue-winged teal nests [1].

In spite of low hunting losses, blue-winged teals have a higher annual
mortality than other dabbling ducks. Perhaps the high nonhunting losses
occur because of the blue-winged teal's lengthy overwater flights to
South America [1].


REFERENCES :
NO-ENTRY
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Occurrence in North America

provided by Fire Effects Information System Animals

AL
AK
AZ
AR
CA
CO
CT
DE
FL
GA
HI

ID
IL
IN
IA
KS
KY
LA
ME
MD
MA

MI
MN
MS
MO
MT
NE
NV
NH
NJ
SD

TN
TX
UT
VT
VA
WA
WV
WI
WY





AB
BC
MB
NB
NF
NT
NS
ON
PE
PQ

SK
YT













MEXICO


license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Predators

provided by Fire Effects Information System Animals
Common predators of blue-winged teal include humans, snakes, snapping
turtles (Chlycha serpentina), dogs (Canidae), eastern crows (Corvus
brachyrhnchos), magpies (Pica spp.), ground squirrels (Citellus spp.),
coyotes (Canis latrans), red foxes (Vulpes fulva), gray foxes (Urocyon
cinereoargenteus), raccoons (Procyon lotor), long-tailed weasels
(Mustela frenata), minks (Mustela vison), striped skunk (Mephitis
mephitis), spotted skunks (Spilogale putorius), and badgers (Taxidea
taxus) [1,2].

During one study, about half of the nest failures of blue-winged teal
were caused by mammals. Striped and spotted skunks were responsible for
two-thirds of these losses. All nest losses caused by birds were
attributed to either crows or magpies [1].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Preferred Habitat

provided by Fire Effects Information System Animals
Breeding habitat - Blue-winged teal inhabit shoreline more often than
open water and prefer calm water or sluggish currents to fast water.
They inhabit inland marshes, lakes, ponds, pools, and shallow streams
with dense emergent vegetation [4]. In coastal areas, breeding occurs
in salt-marsh meadows with adjoining ponds or creeks [10]. Blue-winged
teal use rocks protruding above water, muskrat houses, trunks or limbs
of fallen trees, bare stretches of shoreline, or mud flats for resting
sites [4].

Winter habitat - Blue-winged teal winter on shallow inland freshwater
marshes and brackish and saltwater marshes [4].

Nesting habitat - Blue-winged teal build their nests on dry ground in
grassy sites such as bluegrass meadows, hayfields, and sedge meadows.
They will also nest in areas with very short, sparse vegetation [6].
Blue-winged teal generally nest within several hundred yards of open
water; however, nests have been found as far as 1 mile (1.6 km) away
from water [1]. Where the habitat is good, they nest communally [4].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Regional Distribution in the Western United States

provided by Fire Effects Information System Animals
More info on this topic.

This species can be found in the following regions of the western United States (according to the Bureau of Land Management classification of Physiographic Regions of the western United States):

1 Northern Pacific Border
2 Cascade Mountains
3 Southern Pacific Border
4 Sierra Mountains
5 Columbia Plateau
6 Upper Basin and Range
7 Lower Basin and Range
8 Northern Rocky Mountains
9 Middle Rocky Mountains
10 Wyoming Basin
11 Southern Rocky Mountains
12 Colorado Plateau
13 Rocky Mountain Piedmont
14 Great Plains
15 Black Hills Uplift
16 Upper Missouri Basin and Broken Lands
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Taxonomy

provided by Fire Effects Information System Animals
The currently accepted scientific name for the blue-winged teal is Anas
discors Linnaeus [21]. The two subspecies recognized are listed below
[1,10]:

A. discors spp. discors (western blue-winged teal)
A. discors spp. orphna Stewart and Aldrich (Atlantic blue-winged teal)

The blue-winged teal hybridizes with the cinnamon teal (A. cyanoptera) [21].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Timing of Major Life History Events

provided by Fire Effects Information System Animals
More info for the term: cover

Courtship and pair bonding - The onset of courtship among immature
blue-winged teal often starts in late January or early February. In
areas south of the breeding grounds, blue-winged teal are more active in
courtship during the spring migration than are most other ducks [1].

Nesting - Blue-winged teal are among the last dabbling ducks to nest
[1], generally nesting between April 15 and May 15 [1,2]. Few nests are
started after mid-July [1]. Chronology of nesting can vary from year to
year as a result of weather conditions. At Delta Marshes, Manitoba,
blue-winged teal nesting was delayed a week in 1950 due to abnormally
cold weather [1].

Clutch/incubation - Blue-winged teal generally lay 10 to 12 eggs [10].
Delayed nesting and renesting efforts have substantially smaller
clutches, averaging five to six eggs [10]. Clutch size can also vary
with the age of the hen. Yearlings tend to lay smaller clutches [1].
Incubation takes 21 to 27 days [1,2,10].

Age at sexual maturity - Blue-winged teal are sexually mature after
their first winter [10].

Fledging - Blue-winged teal ducklings can walk to water within 12 hours
after hatching but do not fledge until 6 to 7 weeks [2,10].

Molting - During incubation, the drake leaves its mate and moves to
suitable molting cover where it becomes flightless for a period of 3 to
4 weeks [10].

Migration - Blue-winged teal are generally the first ducks south in the
fall and the last ones north in the spring [1]. Adult drakes depart the
breeding grounds well before adult hens and immatures. Most blue-winged
teal flocks seen after mid-September are composed largely of adult hens
and immatures [1].

The northern regions experience a steady decline in blue-winged teal
populations from early September until early November. Blue-winged teal
in central migration areas tend to remain through September, then
diminish rapidly during October, with small numbers remaining until
December. Large numbers of blue-winged teal appear on wintering grounds
in Florida, Louisiana, and Texas in September [1].
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Use of Fire in Population Management

provided by Fire Effects Information System Animals
More info for the terms: cover, fire regime

Prescribed fire can be used to create nesting edge for ducks. Removal
of dense vegetation and woody encroachment is vital if prairie marshes
are to remain in this successional state [19]. According to Ward [19],
spring burning in marshlands is primarily done to remove vegetation and
create more nesting edge. Summer fires are used to create more
permanent changes in the plant community. If prescribed burning is used
as a management technique in marshes, burning must be completed well
before or after the nesting season [19]. For blue-winged teal, summer
burning should occur after July [19]. Fire can also be used to reduce
predator activity through the elimination of hiding cover [6].

Fire can be used to remove fast-growing undesirable species, such as
common reed (Phragmites australis), and increase production of desirable
blue-winged teal foods such as pondweed and duckweed [20]. The best way
to reduce common reed with prescribed burning is to burn during the
summer when carbohydrate reserves in the plant are low and the soil is
dry [9].

FIRE REGIMES :
Find fire regime information for the plant communities in which this
species may occur by entering the species name in the FEIS home page under
"Find FIRE REGIMES".
license
cc-publicdomain
bibliographic citation
Tesky, Julie L. 1993. Anas discors. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/

Distribution ( Spanish; Castilian )

provided by IABIN
Chile Central
license
cc-by-nc-sa-3.0
copyright
Universidad de Santiago de Chile
author
Pablo Gutierrez
partner site
IABIN

Xarxet alablau ( Catalan; Valencian )

provided by wikipedia CA
 src=
Anas discors - MHNT

El xarxet alablau (Anas discors) és un ànec de mida petita i no és un xarxet en sentit estricte..

Fa uns 40 cm de llarg i pesa uns 370 g.[1] Viu a tota Amèrica del nord excepte l'oest i nord d'Alaska i nord del territori del Canadà.[1][2]

Migra en esbarts a Amèrica central i Amèrica del sud, alguns ho fan al Golf de Mèxic i Califòrnia. De vegades es troben vagant per Europa.

Modernament se l'ha inclòs en el gènere Spatula com (S. discors).

Referències

Plantilla:USDA

  1. 1,0 1,1 Floyd, T (2008)
  2. Dunn, J. & Alderfer, J. (2006)

Bibliografia

Enllaços externs

En altres projectes de Wikimedia:
Commons
Commons (Galeria)
Commons
Commons (Categoria) Modifica l'enllaç a Wikidata
Viquiespècies
Viquiespècies
license
cc-by-sa-3.0
copyright
Autors i editors de Wikipedia
original
visit source
partner site
wikipedia CA

Xarxet alablau: Brief Summary ( Catalan; Valencian )

provided by wikipedia CA
 src= Anas discors - MHNT

El xarxet alablau (Anas discors) és un ànec de mida petita i no és un xarxet en sentit estricte..

Fa uns 40 cm de llarg i pesa uns 370 g. Viu a tota Amèrica del nord excepte l'oest i nord d'Alaska i nord del territori del Canadà.

Migra en esbarts a Amèrica central i Amèrica del sud, alguns ho fan al Golf de Mèxic i Califòrnia. De vegades es troben vagant per Europa.

Modernament se l'ha inclòs en el gènere Spatula com (S. discors).

license
cc-by-sa-3.0
copyright
Autors i editors de Wikipedia
original
visit source
partner site
wikipedia CA

Čírka modrokřídlá ( Czech )

provided by wikipedia CZ

Čírka modrokřídlá (Anas discors) je malý americký druh kachny z rodu čírka (Anas). Samci mají výraznou bílou skvrnu v přední části hlavy, samice se podobají samicím čírky modré. Každoročně zaletuje na Britské ostrovy.[2] Jednou se zatoulala také na území České republiky.[3]

 src=
Letící čírky modrokřídlé s patrnými světle modrými krovkami u samců – viz druhový název
 src=
Anas discors

Reference

  1. Červený seznam IUCN 2018.1. 5. července 2018. Dostupné online. [cit. 2018-08-10]
  2. SVENSON, L. a kol. Ptáci Evropy, severní Afriky a Blízkého východu. Praha: Svojtka&Co, 2004. ISBN 80-7237-658-6.
  3. Pozorování čírky modrokřídlé v ČR na stránkách FK ČSO

Související články

Externí odkazy

Pahýl
Tento článek je příliš stručný nebo postrádá důležité informace.
Pomozte Wikipedii tím, že jej vhodně rozšíříte. Nevkládejte však bez oprávnění cizí texty.
license
cc-by-sa-3.0
copyright
Wikipedia autoři a editory
original
visit source
partner site
wikipedia CZ

Čírka modrokřídlá: Brief Summary ( Czech )

provided by wikipedia CZ

Čírka modrokřídlá (Anas discors) je malý americký druh kachny z rodu čírka (Anas). Samci mají výraznou bílou skvrnu v přední části hlavy, samice se podobají samicím čírky modré. Každoročně zaletuje na Britské ostrovy. Jednou se zatoulala také na území České republiky.

 src= Letící čírky modrokřídlé s patrnými světle modrými krovkami u samců – viz druhový název  src= Anas discors
license
cc-by-sa-3.0
copyright
Wikipedia autoři a editory
original
visit source
partner site
wikipedia CZ

Blauflügelente ( German )

provided by wikipedia DE
 src=
Fliegende Blauflügelenten
 src=
Ruhende Blauflügelente
 src=
Weibchen der Blauflügelente
 src=
Eier der Blauflügelente

Die Blauflügelente (Spatula discors, Syn.: Anas discors) ist eine kleine, in Nordamerika beheimatete Entenart. Sie ist das Pendant zur in der Alten Welt vorkommenden Knäkente (Spatula querquedula), die wie diese seichte Gewässer mit üppiger Vegetation bevorzugt. Die Bestände sind zwar auf Grund der Umwandlung eines Teils ihrer Lebensräume in landwirtschaftlich genutzte Flächen zurückgegangen. Die Art kommt jedoch immer noch sehr häufig vor.[1] Der Bestand wird auf etwa fünf Millionen Individuen geschätzt.[2]

In Europa werden insbesondere im Atlantikbereich nahezu alljährlich Irrgäste festgestellt. Die Zunahme an Beobachtungen in den letzten Jahrzehnten gehen zum Teil allerdings auch auf Gefangenschaftsflüchtlinge zurück. 1986 wurden in Dänemark auch erstmals brütende Blauflügelenten beobachtet.[3]

Kennzeichen

Blauflügelenten sind verhältnismäßig kleine Enten. Ihre Körperlänge beträgt zwischen 37 und 41,5 Zentimeter. Männchen wiegen zwischen 318 und 544 Gramm. Weibchen sind etwas leichter und wiegen ausgewachsen zwischen 227 und 500 Gramm mit einem Durchschnittsgewicht von 377 Gramm.[4]

Das erwachsene Männchen hat einen gräulich-blauen Kopf mit einer weißen, halbmondförmigen Gesichtszeichnung. Der Körper ist graubraun und besitzt am Hinterende einen weißen Fleck. Brust und Bauch sind dunkel getupft. Der Schwanz der Ente ist schwarz. Das Weibchen ist unscheinbar braun gesprenkelt. Beide Geschlechter besitzen einen blauen Flügelfleck, der für die Art namensgebend war. Die Füße sind gelb. Im Ruhekleid ähnelt das Männchen dem Weibchen, allerdings sind die Kopfseiten etwas matter gefärbt.

Am ehesten sind die Weibchen dieser Art mit anderen Kleinenten wie Knäkenten oder Krickenten zu verwechseln, die gelben Füße sind aber ein sicheres Unterscheidungsmerkmal. Im Flug ist die charakteristische Kopfzeichnung beim Männchen das sicherste Unterscheidungsmerkmal von anderen Enten. Weibchen können dagegen im Flug nicht eindeutig identifiziert werden. Blauflügelenten fliegen häufig in dichten Schwärmen. Auffällig ist der häufige Richtungswechsel.[5]

Verbreitungsgebiet

Das Brutgebiet der Blauflügelente erstreckt sich über große Teile der gemäßigten und kalten Klimazone Nordamerikas. Es erreicht im Norden Alaska und erstreckt sich in östlicher Richtung bis zur Mündung des St. Lawrencestroms. Im Süden reicht es vom Norden Nevadas über Texas und Louisiana bis an die Küste von Kalifornien. Der Verbreitungsschwerpunkt liegt in der Prairie Pothole Region Südkanadas und dem Norden der Vereinigten Staaten.[6]

Die Überwinterungsgebiete der Blauflügelente reichen von der Niederkalifornien und Mexiko über Mittelamerika bis nach Kolumbien und Venezuela. Überwinterungsnachweise liegen auch aus Chile, Argentinien und Uruguay vor. Ein geringer Teil der Population überwintert auch im Süden der Vereinigten Staaten. Dazu gehört das Küstengebiet von Texas, Louisiana, Florida und South Carolina sowie in weit geringerem Maße auch Arkansas, Mississippi, Alabama, Georgia, North Carolina, Missouri, Tennessee, Oklahoma und New Mexico. Blauflügelenten sind damit ausgeprägte Zugvögel, bei denen sich Brut- und Überwinterungsgebiet nahezu nicht überlappen. Gelegentlich werden auch Irrgäste auf Kuba, den Bahamas, Haiti und Puerto Rico gesichtet. Auf ihren Zügen gelangen vereinzelte Exemplare bis nach Europa[4] und Nordafrika. Der Zug in die Überwinterungsgebiete erfolgt in Schwärmen und verläuft sehr schnell.[7] Blauflügelenten kehren bereits im Januar in ihre Brutgebiete zurück. Die Rückzugsbewegung erfolgt langsam und ist erst im April abgeschlossen.

Lebensweise

Die Blauflügelente ist eine sehr gesellige Ente, die vom frühen Herbst bis zum Rückzug in die Brutgebiete in Schwärmen beobachtet werden kann. Sie vergesellschaftet sich auch mit anderen Enten wie etwa der Dunkelente, der Zimtente oder der Spießente. Ähnlich wie die Knäkente sucht die Blauflügelente ihre Nahrung in seichten Gewässern. Sie gründelt dabei nur selten. Pflanzliche Nahrung macht den größten Teil ihrer Nahrungsaufnahme aus. Sie frisst außerdem Weichtiere und Krustentiere.

Brutgebiet sind Sumpfgebiete und Teiche in Nordamerika. Blauflügelenten kehren in der Regel bereits verpaart in die Brutgebiete zurück. Sie sind saisonal monogam und verpaaren sich in den Überwinterungsgebieten mit neuen Partnern. Die Fortpflanzungszeit beginnt sehr später. Der Nestbau beginnt frühesten gegen Ende April und endet Mitte Juli. Die meisten Nester werden um Mitte Mai errichtet. Das Nest besteht lediglich aus einer kleinen Bodendelle, die mit Gras und Daunen ausgepolstert wird. Es findet sich nicht mehr als 400 Meter von der Uferlinie entfernt.[8] Die Eiablage erfolgt mit einem Abstand von etwa einem Tag. Eine Gelege besteht in der Regel aus neun bis dreizehn gelbbraunen Eier. Es brütet allein das Weibchen. Brutbeginn ist mit Abschluss der Eiablage. Die Männchen halten sich anfangs in der Nähe des Nest auf. Sie verlassen das Brutrevier jedoch noch vor dem Schlupf der Dunenküken und suchen die Mauserreviere auf. Die Küken sind nach etwa 42 Tage flügge.

Systematik

Die monotypische Blauflügelente ist eng verwandt mit der Zimtente, mit der gelegentlich eine Hybridisation vorkommt. Die Brutareale überlappen sich jedoch sehr großräumig, so dass die beiden Arten keine Superspezies miteinander bilden.[9]

Belege

Einzelnachweise

  1. Kear, S. 549.
  2. Hans-Günther Bauer, Einhard Bezzel und Wolfgang Fiedler (Hrsg.): Das Kompendium der Vögel Mitteleuropas: Alles über Biologie, Gefährdung und Schutz. Band 1: Nonpasseriformes – Nichtsperlingsvögel. Aula-Verlag Wiebelsheim, Wiesbaden 2005, ISBN 3-89104-647-2, S. 102.
  3. Hans-Günther Bauer, Einhard Bezzel und Wolfgang Fiedler (Hrsg.): Das Kompendium der Vögel Mitteleuropas: Alles über Biologie, Gefährdung und Schutz. Band 1: Nonpasseriformes – Nichtsperlingsvögel. Aula-Verlag Wiebelsheim, Wiesbaden 2005, ISBN 3-89104-647-2, S. 102 und S. 103.
  4. a b Kear, S. 546.
  5. Kear, S. 548.
  6. Christopher S. Smith: Field Guide to Upland Birds and Waterfowl. Wilderness Adventure Press, Belgrade (Montana) 2000, ISBN 1-885106-20-3, S. 64.
  7. Gooders und Boyer, S. 69.
  8. Kear, S. 348
  9. Hans-Günther Bauer, Einhard Bezzel und Wolfgang Fiedler (Hrsg.): Das Kompendium der Vögel Mitteleuropas: Alles über Biologie, Gefährdung und Schutz. Band 1: Nonpasseriformes – Nichtsperlingsvögel. Aula-Verlag Wiebelsheim, Wiesbaden 2005, ISBN 3-89104-647-2, S. 102.

Literatur

  • Janet Kear (Hrsg.): Ducks, Geese and Swans. Oxford University Press, 2005, ISBN 0-19-854645-9.
  • Hartmut Kolbe: Die Entenvögel der Welt. Ulmer Verlag, 1999, ISBN 3-8001-7442-1.
  • John Gooders, Trevor Boyer: Ducks of Britain and the Northern Hemisphere. Dragon's World Ltd, Surrey 1986, ISBN 1-85028-022-3.

Weblinks

 src=
– Sammlung von Bildern und Audiodateien
 title=
license
cc-by-sa-3.0
copyright
Autoren und Herausgeber von Wikipedia
original
visit source
partner site
wikipedia DE

Blauflügelente: Brief Summary ( German )

provided by wikipedia DE
 src= Fliegende Blauflügelenten  src= Ruhende Blauflügelente  src= Weibchen der Blauflügelente  src= Eier der Blauflügelente

Die Blauflügelente (Spatula discors, Syn.: Anas discors) ist eine kleine, in Nordamerika beheimatete Entenart. Sie ist das Pendant zur in der Alten Welt vorkommenden Knäkente (Spatula querquedula), die wie diese seichte Gewässer mit üppiger Vegetation bevorzugt. Die Bestände sind zwar auf Grund der Umwandlung eines Teils ihrer Lebensräume in landwirtschaftlich genutzte Flächen zurückgegangen. Die Art kommt jedoch immer noch sehr häufig vor. Der Bestand wird auf etwa fünf Millionen Individuen geschätzt.

In Europa werden insbesondere im Atlantikbereich nahezu alljährlich Irrgäste festgestellt. Die Zunahme an Beobachtungen in den letzten Jahrzehnten gehen zum Teil allerdings auch auf Gefangenschaftsflüchtlinge zurück. 1986 wurden in Dänemark auch erstmals brütende Blauflügelenten beobachtet.

license
cc-by-sa-3.0
copyright
Autoren und Herausgeber von Wikipedia
original
visit source
partner site
wikipedia DE

Blue-winged teal

provided by wikipedia EN

The blue-winged teal (Spatula discors) is a species of bird in the duck, goose, and swan family Anatidae. One of the smaller members of the dabbling duck group, it occurs in North America, where it breeds from southern Alaska to Nova Scotia, and south to northern Texas. It winters along the Pacific and Atlantic coasts and south into the Caribbean islands and Central America.

Taxonomy

The first formal description of the blue-winged teal was by the Swedish naturalist Carl Linnaeus in 1766 in the twelfth edition of his Systema Naturae. He coined the binomial name Anas discors.[2] A molecular phylogentic study comparing mitochondrial DNA sequences published in 2009 found that the genus Anas, as then defined, was non-monophyletic.[3] The genus was subsequently split into four monophyletic genera with ten species including the blue-winged teal moved into the resurrected genus Spatula.[4] This genus had been originally proposed by the German zoologist Friedrich Boie in 1822.[5][6] The name Spatula is the Latin for a "spoon" or "spatula". The specific epithet discors is the Latin for "different" or "at variance".[7]

Description

Blue-winged teal drake in flight at Sacramento National Wildlife Refuge

The blue-winged teal is 40 cm (16 in) long, with a wingspan of 58 cm (23 in), and a weight of 370 g (13 oz).[8] The adult male has a greyish blue head with a white facial crescent, a light brown body with a white patch near the rear and a black tail. The adult female is mottled brown, and has a whitish area at base of bill. Both sexes have sky-blue wing coverts, a green speculum, and yellow legs.[8][9] They have two molts per year and a third molt in their first year.[8] The call of the male is a short whistle; the female's call is a soft quack.[8]

Distribution

The range is all of North America except western and northern Alaska, northern Yukon Territory, northern Northwest Territories and the northeastern area of Canada. Blue-winged teal are rare in the desert southwest, and the west coast. The breeding habitat of the blue-winged teal is marshes and ponds.[8][9]

The breeding range extends from east-central Alaska and southern Mackenzie District east to southern Quebec and southwestern Newfoundland. In the contiguous United States it breeds from northeast California east to central Louisiana, central Tennessee, and the Atlantic Coast.[10][11] The western blue-winged teal inhabits that part of the breeding range west of the Appalachian Mountains. The Atlantic blue-winged teal nests along the Atlantic Coast from New Brunswick to Pea Island, North Carolina.[12]

They migrate in flocks to winter in to the south of its breeding range. During migration, some birds may fly long distances over open ocean. They are occasional vagrants to Europe, where their yellow legs are a distinction from other small ducks like the common teal and garganey,[8][9] and in recent years have been annual vagrants in Britain and Ireland.[13][14][15] The blue-winged teal winters from southern California to western and southern Texas, the Gulf Coast to the Atlantic Coast, the Caribbean, and south to Central and South America. It is often seen wintering as far south as Brazil and central Chile.[8][9][10]

Habitat

Blue-winged teal inhabit shoreline more often than open water and prefer calm water or sluggish currents to fast water. They inhabit inland marshes, lakes, ponds, pools, and shallow streams with dense emergent vegetation.[10] In coastal areas, breeding occurs in salt-marsh meadows with adjoining ponds or creeks.[11] Blue-winged teal use rocks protruding above water, muskrat houses, trunks or limbs of fallen trees, bare stretches of shoreline, or mud flats for resting sites.[10]

Blue-winged teal winter on shallow inland freshwater marshes and brackish and saltwater marshes.[10] They build their nests on dry ground in grassy sites such as bluegrass meadows, hayfields, and sedge meadows. They will also nest in areas with very short, sparse vegetation.[16] Blue-winged teal generally nest within several hundred yards of open water; however, nests have been found as far as 1.61 km (1 mi) away from water.[12] Where the habitat is good, they nest communally.[10]

Blue-winged teal often use heavy growth of bulrushes and cattails as escape cover.[17] Grasses, sedges, and hayfields provide nesting cover for these ducks.[16] Erik Fritzell reported that blue-winged teal nests located in light to sparse cover were more successful than those in heavy cover. Nesting success was 47% on grazed areas and 14% on ungrazed areas.[16]

The blue-winged teal is primarily found in the northern prairies and parklands. It is the most abundant duck in the mixed-grass prairies of the Dakotas and the prairie provinces of Canada. The blue-winged teal is also found in wetlands of boreal forest associations, shortgrass prairies, tallgrass prairies, and deciduous woodlands.[12]

This duck commonly inhabits wetland communities dominated by bulrush (Scirpus spp.), cattail (Typha spp.), pondweed (Potamogeton spp.), sedges (Carex spp.), widgeongrass (Ruppia maritima), and other emergent and aquatic vegetation.[12][17] During molting, it often remains among extensive beds of bulrushes and cattails. The blue-winged teal favors areas dominated by bluegrass (Poa spp.) for nesting. Hayfields and plant communities of buckbrush (Ceonothus cuneatus) and sedges are also important as nest sites.[12]

Behavior

Males and a female, Richmond, British Columbia
In flight, Ladner, British Columbia

These birds feed by dabbling in shallow water at the edge of marshes or open water.[8] They mainly eat plants; their diet may include molluscs and aquatic insects.

Blue-winged teal are generally the first ducks south in the fall and the last ones north in the spring. Adult drakes depart the breeding grounds well before adult hens and immatures. Most blue-winged teal flocks seen after mid-September are composed largely of adult hens and immatures.[12] The northern regions experience a steady decline in blue-winged teal populations from early September until early November. Blue-winged teal in central migration areas tend to remain through September, then diminish rapidly during October, with small numbers remaining until December. Large numbers of blue-winged teal appear on wintering grounds in Florida, Louisiana, and Texas in September.[12]

Reproduction

Anas discors - MHNT

The onset of courtship among immature blue-winged teal often starts in late January or early February. In areas south of the breeding grounds, blue-winged teal are more active in courtship during the spring migration than are most other ducks.[12]

Blue-winged teal are among the last dabbling ducks to nest,[12] generally nesting between April 15 and May 15.[12][17] Few nests are started after mid-July.[12] Chronology of nesting can vary from year to year as a result of weather conditions. At Delta Marshes, Manitoba, blue-winged teal nesting was delayed a week in 1950 due to abnormally cold weather.[12] The nest is a shallow depression on the ground lined with grass and down, usually surrounded by vegetation.

Blue-winged teal generally lay 10 to 12 eggs. Delayed nesting and renesting efforts have substantially smaller clutches, averaging five to six eggs. Clutch size can also vary with the age of the hen. Yearlings tend to lay smaller clutches.[12] Incubation takes 21 to 27 days.[11][12][17] Blue-winged teal are sexually mature after their first winter. During incubation, the drake leaves its mate and moves to suitable molting cover where it becomes flightless for a period of 3 to 4 weeks.

Blue-winged teal ducklings can walk to water within 12 hours after hatching but do not fledge until 6 to 7 weeks.[11][17]

Food habits

Blue-winged teal are surface feeders and prefer to feed on mud flats, in fields, or in shallow water where there is floating and shallowly submerged vegetation plus abundant small aquatic animal life. They mostly eat vegetative matter consisting of seeds or stems and leaves of sedge, grass, pondweed, smartweed (Polygonum spp.), duckweed (Lemna spp.), Widgeongrass, and muskgrass (Chara spp.).[10][11][12] The seeds of plants that grow on mud flats, such as nutgrass (Cyperus spp.), smartweed, millet (Panicum spp.), and Rice Cut-grass (Leersia oryzoides), are avidly consumed by this duck.[12] One-fourth of the food consumed by blue-winged teal is animal matter such as mollusks, crustaceans, and insects.[10][11][12]

Predators

Common predators of blue-winged teal include humans, snakes, snapping turtles (Chlycha serpentina), dogs, cats, muskellunge (Esox masquinongy), American crows (Corvus brachyrhnchos), magpies (Pica spp.), ground squirrels, coyotes (Canis latrans), red foxes (Vulpes fulva), gray foxes (Urocyon cinereoargenteus), raccoons (Procyon lotor), long-tailed weasels (Mustela frenata), American minks (Mustela vison), striped skunks (Mephitis mephitis), spotted skunks (Spilogale putorius), and American badgers (Taxidea taxus).[12][17]

During one study, about half of the nest failures of blue-winged teal were caused by mammals. Striped and Spotted Skunks were responsible for two-thirds of these losses. All nest losses caused by birds were attributed to either crows or magpies.[12]

References

Public Domain This article incorporates public domain material from Anas discors. United States Department of Agriculture.

  1. ^ BirdLife International (2020). "Spatula discors". IUCN Red List of Threatened Species. 2021: e.T22680229A137731845. doi:10.2305/IUCN.UK.2021-3.RLTS.T22680229A137731845.en. Retrieved 30 April 2023.|date= / |doi= mismatch
  2. ^ Linnaeus, Carl (1766). Systema naturae : per regna tria natura, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Vol. 1, Part 1 (12th ed.). Holmiae (Stockholm): Laurentii Salvii. p. 205.
  3. ^ Gonzalez, J.; Düttmann, H.; Wink, M. (2009). "Phylogenetic relationships based on two mitochondrial genes and hybridization patterns in Anatidae". Journal of Zoology. 279 (3): 310–318. doi:10.1111/j.1469-7998.2009.00622.x.
  4. ^ Gill, Frank; Donsker, David, eds. (2017). "Screamers, ducks, geese & swans". World Bird List Version 7.3. International Ornithologists' Union. Retrieved 23 July 2017.
  5. ^ Boie, Friedrich (1822). "Generalübersicht". Isis von Oken (in German). Col 564.
  6. ^ Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-list of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 460.
  7. ^ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 137, 361. ISBN 978-1-4081-2501-4.
  8. ^ a b c d e f g h Floyd, T. (2008). Smithsonian Field Guide to the Birds of North America. New York: Harper Collins. ISBN 978-0-06-112040-4.
  9. ^ a b c d Dunn, J.; Alderfer, J. (2006). National Geographic Field Guide to the Birds of North America (5th ed.). ISBN 0-7922-5314-0.
  10. ^ a b c d e f g h DeGraaf, Richard M.; et al. (1991). "Forest and rangeland birds of the United States: Natural history and habitat use". Agric. Handb. Washington, DC: U.S. Department of Agriculture, Forest Service (688).
  11. ^ a b c d e f Johnsgard, Paul A. (1979). A guide to North American waterfowl. Bloomington, IN: Indiana University Press. ISBN 0253127890.
  12. ^ a b c d e f g h i j k l m n o p q r s Bellrose, Frank C. (1980). Ducks, geese and swans of North America (3rd ed.). Harrisburg, PA: Stackpole Books. ISBN 0811705358.
  13. ^ "Irish Rare Bird Report". Irish Birds. 7: 552. 2003.
  14. ^ "Irish Rare Bird Report". Irish Birds. 8: 397, 585. 2006–2007.
  15. ^ "Irish Rare Bird Report". Irish Birds. 9: 79. 2008.
  16. ^ a b c Fritzell, Erik K. (1975). "Effects of agricultural burning on nesting waterfowl". Canadian Field-Naturalist. 89: 21–27.
  17. ^ a b c d e f Bennett, Logan J. (1938). The blue-winged teal: Its ecology and management. Ames, IA: Collegiate Press.
license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Blue-winged teal: Brief Summary

provided by wikipedia EN

The blue-winged teal (Spatula discors) is a species of bird in the duck, goose, and swan family Anatidae. One of the smaller members of the dabbling duck group, it occurs in North America, where it breeds from southern Alaska to Nova Scotia, and south to northern Texas. It winters along the Pacific and Atlantic coasts and south into the Caribbean islands and Central America.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Spatula discors ( Spanish; Castilian )

provided by wikipedia ES

La cerceta aliazul (Spatula discors),[2]​ también conocida como pato media luna, pato de alas azules, barraquete aliazul, pato de Florida o yaguasa aliazul,[3]​ es una especie de ave anseriforme de la familia Anatidae nativa de América No se conocen subespecies.

Descripción

Es pardo manchado y punteado de negro, con diseño alar como el del pato pico cuchara sudamericano, cabeza y cuello ceniciento oscuro, notable medialuna en la cara y mancha blanca en los flancos, en los machos. La hembra no tiene la medialuna en la cara, pero tiene una leve ceja loreal clara.

El macho es más grande que la hembra; la longitud total es de 35 a 41 cm. El peso oscila entre 325 y 500 g, según la temporada del año; son más pesados antes de la migración. Ambos sexos mudan las plumas dos veces al año.

El pico (culmen) mide de 4 a 4,2 cm. El largo total del ala va de 17,5 a 18,2 cm. La cola mide 6,5 cm. El tarso tiene 3,25 cm.

 src=
Cerceta aliazul en vuelo en una reserva natural de Texas
 src=
Machos alimentándose

Hábitat

Esta especie de pato vive en lagunas, lagos y pantanos de agua dulce. No teniendo preferencias durante el invierno habita aguas salobres. Se alimenta de vegetación, insectos, y crustáceos acuáticos. Complementa su dieta con semillas, incluyendo las de campos cultivados.

 src=
Machos y hembras nadando en un humedal de la Columbia Británica

Distribución

Anas discors se distribuye en América del Norte, desde Alaska hasta Nueva Escocia al este y Texas al sur, donde se reproduce. La población en el estado de Texas es sedentaria. Durante invierno migran hasta Sudamérica.

Comportamiento

Migración

En invierno emigran en bandadas al sur de Estados Unidos (por ambas costas), México, América Central, América del Sur (llegando hasta Uruguay y Argentina), y las islas del Caribe. Durante la migración, algunas aves vuelan grandes distancias sobre el océano. Ocasionalmente se los ha visto vagando por Europa, donde sus patas amarillas son una distinción de otros patos pequeños (como Anas crecca y Anas querquedula).

Reproducción

 src=
Anas discors - MHNT

Nidifican de abril a mayo en el hemisferio norte. Las parejas se forman en invierno, llegando juntos al lugar donde van a anidar. Los machos son territoriales en época de cría. La hembra pone de seis a catorce huevos de color crema, los cuales incuba ella misma durante diecinueve a veintinueve días; todos los pichones nacen el mismo día. Los juveniles vuelan a los cuarenta días, madurando sexualmente en la temporada siguiente.

Alimentación

Son omnívoros, se alimentan de pequeños animales y plantas acuáticas.[4]

Conservación

La destrucción de su hábitat es una de las grandes amenazas para esta especie.

En Colombia la especie cuenta con una gran amenaza debido a envenenamientos masivos con arroz, para comercializar su carne. Según las autoridades la cacería de los patos se hacía con escopeta, tiros de regadera y resorteras (tirachinas), pero desde 1996 los han envenenado masivamente. Antes de 1996 se cazaban entre cien y doscientos ejemplares al año.

Para envenenarlos los cazadores ubican un comedero donde se estacionan las bandadas de cercetas aliazules; luego cocinan semillas de arroz, les agregan veneno y las ponen a secar al sol. Al secarse el arroz lo riegan en el humedal, donde los patos se alimentan. Cuando están envenenados les disparan, simulando que fueron cazados.

En 2010 se reportó el envenenamiento de cinco mil patos en Las Chispas, Departamento de Sucre. En 2011 se mataron más de dos mil en el municipio de San Martín, al sur del departamento del César, y en el 2012 la policía encontró cuatrocientos patos muertos y listos a comercializar en el municipio de María la Baja, al norte del departamento de Bolívar.

Referencias

  1. BirdLife International (2012). «Anas discors». Lista Roja de especies amenazadas de la UICN 2013.2 (en inglés). ISSN 2307-8235. Consultado el 9 de diciembre de 2014.
  2. Bernis, F; De Juana, E; Del Hoyo, J; Fernández-Cruz, M; Ferrer, X; Sáez-Royuela, R; Sargatal, J (1994). «Nombres en castellano de las aves del mundo recomendados por la Sociedad Española de Ornitología (Primera parte: Struthioniformes-Anseriformes)». Ardeola. Handbook of the Birds of the World (Madrid: SEO/BirdLife) 41 (1): 79-89. ISSN 0570-7358. Consultado el 10 de diciembre de 2014.
  3. «Cerceta Aliazul (Spatula discors) Linnaeus, 1766». Avibase. Consultado el 10 de diciembre de 2014.
  4. https://web.archive.org/web/20140914024800/http://darnis.inbio.ac.cr/ubis/FMPro?-DB=ubipub.fp3&-lay=WebAll&-error=norec.html&-Format=detail.html&-Op=eq&id=2707&-Find

 title=
license
cc-by-sa-3.0
copyright
Autores y editores de Wikipedia
original
visit source
partner site
wikipedia ES

Spatula discors: Brief Summary ( Spanish; Castilian )

provided by wikipedia ES

La cerceta aliazul (Spatula discors),​ también conocida como pato media luna, pato de alas azules, barraquete aliazul, pato de Florida o yaguasa aliazul,​ es una especie de ave anseriforme de la familia Anatidae nativa de América No se conocen subespecies.

license
cc-by-sa-3.0
copyright
Autores y editores de Wikipedia
original
visit source
partner site
wikipedia ES

Sinisiipitavi ( Finnish )

provided by wikipedia FI

Sinisiipitavi (Spatula discors) on pieni sorsalintu.

Ulkonäkö ja koko

Sinisiipitavilla on siniharmaa pää, jossa on silmän edessä valkea raita. Lajilla on vaaleanruskea vartalo, valkea läikkä pyrstön tyvessä ja musta pyrstö. Siipiläikkä on sininen. Lennossa sinisiipitavi räpyttää siipiään kiivaasti. Pituus on 35–41 cm, siipien kärkiväli 65 cm ja paino 260–410 g.

Levinneisyys

 src=
Koiras lennossa
 src=
Kaksi koirasta ja naaras Richmondissa, Kanadassa.
 src=
Anas discors

Sinisiipitavi pesii Pohjois-Amerikan pohjois- ja keskiosissa ja muuttaa Keski- ja Etelä-Amerikkaan aina Chileen ja Argentiinaan asti. Euroopassa sitä tavataan tarhakarkulaisena tai muuttoretkien harhailijoina. Suomessa se on äärimmäisen harvinainen harhailija. Ensimmäinen havainto tehtiin keväällä 1972 Siuntion Störsvikissä. Sen jälkeen lajia on nähty Suomessa vain noin 15 kertaa.[2]

Lisääntyminen

Sinisiipitavi munii 6–15 munaa, jotka painavat noin 30 grammaa.

Ravinto

Sinisiipitavi syö kasveja, sekä jonkun verran vesihyönteisiä ja kotiloita.

Lähteet

  1. BirdLife International: Spatula discors IUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 4.6.2014. (englanniksi)
  2. Rariteettikomitea Birdlife.fi. BirdLife Suomi. Viitattu 18.4.2010.

Aiheesta muualla

Tämä lintuihin liittyvä artikkeli on tynkä. Voit auttaa Wikipediaa laajentamalla artikkelia.
license
cc-by-sa-3.0
copyright
Wikipedian tekijät ja toimittajat
original
visit source
partner site
wikipedia FI

Sinisiipitavi: Brief Summary ( Finnish )

provided by wikipedia FI

Sinisiipitavi (Spatula discors) on pieni sorsalintu.

license
cc-by-sa-3.0
copyright
Wikipedian tekijät ja toimittajat
original
visit source
partner site
wikipedia FI

Sarcelle à ailes bleues ( French )

provided by wikipedia FR

Spatula discors

La Sarcelle à ailes bleues (Spatula discors, anciennement Anas discors), connue aussi en tant que Sarcelle soucrourou ou Canard soucrourou, est une espèce de canards de surface de la famille des Anatidae. C'est un oiseau américain qui peut exceptionnellement être aperçu en Europe[1],[2].

Description

 src=
Mâle et femelle au Marais Léon-Provancher
Blue-winged teal in flight Sand Lake National Wildlife Refuge (5789615855).jpg

Le plumage de l'espèce ressemble beaucoup à celui du Canard bridé. On la reconnaît parmi les autres Anatinae grâce à ses pattes jaunes caractéristiques. Le mâle adulte possède une tête gris-bleu avec un croissant blanc sur la joue, un corps brun clair avec une tache blanche à l'arrière et une queue noire. La femelle adulte est brune tachetée. Les deux sexes ont des miroirs verts sur les ailes et les couvertures alaires sont bleus. En vol, leurs ailes se rabattent particulièrement vite.

Cet oiseau mesure environ 41 cm de longueur pour une envergure de 60 à 64 cm et un poids de 273 à 427 g.

Communication

Le mâle émet des sifflements qui peuvent être repris par le couple. La femelle pousse des « quack » doux et haut perchés.

Répartition et habitat

 src=
Carte de répartition
  • Aire de nidification
  • Voie migratoire
  • Présent à l'année
  • Aire d'hivernage

Ce sont des oiseaux qui migrent en bandes vers l'Amérique centrale ou du Sud. Ils peuvent parcourir de très grandes distances y compris au-dessus de la surface des eaux.

 src=
Anas discors - MHNT

Ils nichent dans les marais et les étangs de l'Amérique du Nord et du Centre. Le nid est une dépression bordée d'herbe, généralement entourée de végétation.

Alimentation

Ces oiseaux s'alimentent en filtrant les eaux peu profondes. Ils se nourrissent principalement de végétaux, leur régime alimentaire peut inclure des mollusques et des insectes aquatiques.

Systématique

Taxonomie et dénomination

Georges-Louis Leclerc de Buffon utilise le terme de soucrourou pour désigner ces sarcelles, il affirme que ce terme est originaire de Guyane[3].

Phylogénie

La phylogénie de l'espèce est disputée depuis longtemps. Certains auteurs[Qui ?] la pensent même autrefois proche de la sarcelle d'été. Des analyses de l'ADN de l'espèce révèlent que celui-ci est quasiment identique à celui de la sarcelle cannelle.

Voir aussi

Références taxonomiques

Notes

  1. « Séries temporelles », Anas discors, INPN
  2. Transfert de 10 espèces de sarcelles et de barboteurs du genre Anas au genre Spatula (Gonzalez et al.2009, H & M4, NACC 2017-B-10)
  3. (fr) Buffon, « La sarcelle soucrourou. Dixième espèce. », HISTOIRE NATURELLE, GÉNÉRALE ET PARTICULIÈRE, AVEC LA DESCRIPTION DU CABINET DU ROI. Tome Vingt-quatrième.

license
cc-by-sa-3.0
copyright
Auteurs et éditeurs de Wikipedia
original
visit source
partner site
wikipedia FR

Sarcelle à ailes bleues: Brief Summary ( French )

provided by wikipedia FR

Spatula discors

La Sarcelle à ailes bleues (Spatula discors, anciennement Anas discors), connue aussi en tant que Sarcelle soucrourou ou Canard soucrourou, est une espèce de canards de surface de la famille des Anatidae. C'est un oiseau américain qui peut exceptionnellement être aperçu en Europe,.

license
cc-by-sa-3.0
copyright
Auteurs et éditeurs de Wikipedia
original
visit source
partner site
wikipedia FR

Spatula discors ( Italian )

provided by wikipedia IT
 src=
Anas discors

La marzaiola americana, anatra aliazzurre americana o alzavola ali azzurre americana (Spatula discors (Linnaeus, 1766)) è un uccello della famiglia degli Anatidi.[2].

Descrizione

Il maschio adulto ha la testa azzurro grigiastra con una mezzaluna facciale bianca, il corpo bruno chiaro con una macchia bianca vicino al deretano e la coda nera. La femmina adulta è bruno screziata. Entrambi i sessi hanno una macchia alare azzurra.

Dimensioni e peso

Lunghezza adulto: da 36 cm a 41 cm.

Apertura alare: da 56 cm a 62 cm.

Peso adulto: da 280 g a 500 g.

Biologia

Voce

Il richiamo del maschio è un breve fischio; il richiamo della femmina è un dolce quack.

Alimentazione

Questi uccelli si nutrono sguazzando in acque basse. Mangiano soprattutto piante acquatiche e semi; la loro dieta può comprendere molluschi e insetti acquatici.

Riproduzione

Il nido è una bassa depressione sul suolo rivestita con erba e piumino, solitamente sormontata da vegetazione. Il nido è costruito al riparo in zone erbose o canneti, la femmina vi depone da 6 a 14 uova che cova per poco più di 21 giorni, gli anatroccoli impiegheranno circa 40 giorni per svilupparsi e poter volare.

Distribuzione e habitat

Il loro habitat di nidificazione sono le paludi e gli stagni di tutto il Nordamerica settentrionale e centrale.

Migrano in stormi verso il Centro e il Sudamerica. Durante la migrazione, alcuni uccelli possono volare per lunghe distanze sopra l'oceano aperto. Sono visitatori occasionali dell'Europa, dove le loro zampe gialle le distinguono da altre piccole anatre, come l'alzavola comune e la marzaiola. Le analisi del DNA di questa specie hanno rivelato che il suo corredo genetico è quasi identico a quello dell'alzavola cannella.

Tassonomia

Esistono due sottospecie:

  • Anas discors discors.
  • Anas discors orphna.

Note

  1. ^ (EN) BirdLife International 2016, Spatula discors, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020. URL consultato il 30 settembre 2018.
  2. ^ (EN) Gill F. and Donsker D. (eds), Family Anatidae, in IOC World Bird Names (ver 9.2), International Ornithologists’ Union, 2019. URL consultato il 30 settembre 2018.

 title=
license
cc-by-sa-3.0
copyright
Autori e redattori di Wikipedia
original
visit source
partner site
wikipedia IT

Spatula discors: Brief Summary ( Italian )

provided by wikipedia IT
 src= Anas discors

La marzaiola americana, anatra aliazzurre americana o alzavola ali azzurre americana (Spatula discors (Linnaeus, 1766)) è un uccello della famiglia degli Anatidi..

license
cc-by-sa-3.0
copyright
Autori e redattori di Wikipedia
original
visit source
partner site
wikipedia IT

Blauwvleugeltaling ( Dutch; Flemish )

provided by wikipedia NL

Vogels

De blauwvleugeltaling (Spatula discors synoniem: Anas discors) is een eend uit Noord-Amerika.

Kenmerken

De woerd heeft een zwarte kruin op het voorhoofd en de kin. Een opvallende, halvemaanvormige, witte vlek tussen oog en snavel. De rest van de kop is blauwgrijs. De voorvleugel is hemelsblauw tot spiegelgroen. De onderkant is okergeel met dicht op elkaar staande ronde zwarte vlekjes. De staartdekveren aan weerskanten zijn beschilderd met een witte vlek. De snavel is zwart en de poten zijn geel. Het vrouwtje heeft een lichtblauwe voorvleugel en een witte buik. De lichaamslengte bedraagt ongeveer 40 cm.

Voortplanting

In het voorjaar worden 10 tot 12 cremekleurige eieren afgezet, die in ongeveer 23 dagen worden uitgebroed. De kuikens zijn lichtbruin met gele vlekken. Ze hebben een lichtere onderzijde.

Verspreiding en leefgebied

De blauwvleugeltaling leeft in centraal Noord-Amerika in voedselrijke ondiepe meren, plassen met verlandingszones en moerassen. De winter wordt doorgebracht in Midden-Amerika.

Bronnen, noten en/of referenties
  • De grote dierenencyclopedie, (1993) Zuidnederlandse Uitgeverij N.V., Aartselaar, België. ISBN 90-243-5204-5.
license
cc-by-sa-3.0
copyright
Wikipedia-auteurs en -editors
original
visit source
partner site
wikipedia NL

Blauwvleugeltaling: Brief Summary ( Dutch; Flemish )

provided by wikipedia NL

De blauwvleugeltaling (Spatula discors synoniem: Anas discors) is een eend uit Noord-Amerika.

license
cc-by-sa-3.0
copyright
Wikipedia-auteurs en -editors
original
visit source
partner site
wikipedia NL

Blåvingeand ( Norwegian )

provided by wikipedia NO
 src=
Anas discors

Blåvingeand (vitenskapelig navn Anas discors) er en fugl i andefamilien.

Kilder

Eksterne lenker


ornitologistubbDenne ornitologirelaterte artikkelen er foreløpig kort eller mangelfull, og du kan hjelpe Wikipedia ved å utvide den.
Det finnes mer utfyllende artikkel/artikler på .
license
cc-by-sa-3.0
copyright
Wikipedia forfattere og redaktører
original
visit source
partner site
wikipedia NO

Blåvingeand: Brief Summary ( Norwegian )

provided by wikipedia NO
 src= Anas discors

Blåvingeand (vitenskapelig navn Anas discors) er en fugl i andefamilien.

license
cc-by-sa-3.0
copyright
Wikipedia forfattere og redaktører
original
visit source
partner site
wikipedia NO

Cyranka modroskrzydła ( Polish )

provided by wikipedia POL
Commons Multimedia w Wikimedia Commons
 src=
Anas discors

Cyranka modroskrzydła (Spatula discors) – gatunek średniego ptaka wodnego z rodziny kaczkowatych (Anatidae).

Występowanie

Zamieszkuje północną część Ameryki Północnej. Zimuje w obu Amerykach na południe od linii Kalifornia - Karolina Północna osiągając Chile i Argentynę. Często pojawia się na Antylach i Bahamach, rzadziej na Galapagos, Grenlandii, Aleutach, Hawajach oraz Europie i Afryce Północnej. W Polsce pojawia się sporadycznie.

Morfologia

Cechy gatunku
Samiec ma głowę i szyję łupkowoczarną ze śliwkowym, metalicznym połyskiem. U nasady dzioba charakterystyczny biały sierp. Grzbiet ciemny ze słabo zaznaczonym cętkowaniem. Reszta tułowia, w tym brzuch, rdzawobrązowa z ciemnymi plamkami. W locie widoczna na wierzchu skrzydła błękitna pokrywa skrzydłowa. Lusterko zielone, spód skrzydeł biały. Samica i samiec w szacie spoczynkowej oliwkowobrązowe z błękitnymi pokrywami skrzydłowymi. Samica ma biały brzuch.
Wymiary średnie[6][7]
dł. ciała ok. 38-43 cm
rozpiętość skrzydeł 58-79 cm
masa ciała ok. 260-410 g

Ekologia

Biotop
Różnorodne zbiorniki śródlądowe. Latem preferuje małe, gęsto zarośnięte oczka i wolno płynące rzeki, a zimą duże i płytkie zbiorniki wodne.
Gniazdo
Płytkie zagłębienia w pobliżu wody wypełnione trawą oraz chwastami i pokryte puchem[7].
Jaja
W ciągu roku wyprowadza jeden lęg, składając w maju 6 do 15 oliwkowobiałych do kremowych jaj[7] o średnich wymiarach 46 x 33 mm i średniej masie 29 g
Wysiadywanie
Jaja wysiadywane są przez okres 18 dni przez samicę[7]. Pisklęta opuszczają gniazdo po wykluciu, usamodzielniają się po 35 - 44 dniach. Opiekuje się nimi wyłącznie samica.
Pożywienie
Bezkręgowce wodne uzupełnione przez rośliny wodne i lądowe[7].

Ochrona

W Polsce podlega ścisłej ochronie gatunkowej[8].

Zobacz też

Przypisy

  1. Anas discors, w: Integrated Taxonomic Information System (ang.) [dostęp 2014-02-09]
  2. Anas discors discors, w: Integrated Taxonomic Information System (ang.) [dostęp 2014-01-21]
  3. Anas discors orphna, w: Integrated Taxonomic Information System (ang.) [dostęp 2014-01-21]
  4. Denis Lapage: Cyranka modroskrzydła (Anas discors) Linnaeus, 1766. Avibase. [dostęp 2014-01-21].
  5. BirdLife International 2012, Spatula discors [w:] The IUCN Red List of Threatened Species [online], wersja 2014.2 [dostęp 2014-09-28] (ang.).
  6. Sterry i in. 2002 ↓, s. 70.
  7. a b c d e Blue-winged Teal Anas discors (ang.). WhatBird. [dostęp 2014-01-21].
  8. Rozporządzenie Ministra Środowiska z dnia 6 października 2014 r. w sprawie ochrony gatunkowej zwierząt (Dz.U. z 2014 r. poz. 1348).

Bibliografia

  1. Paul Sterry, Andrew Cleave, Andy Clements, Peter Goodfellow: Ptaki Europy: przewodnik ilustrowany. Warszawa: Horyzont, 2002. ISBN 83-7311-341-X.
license
cc-by-sa-3.0
copyright
Autorzy i redaktorzy Wikipedii
original
visit source
partner site
wikipedia POL

Cyranka modroskrzydła: Brief Summary ( Polish )

provided by wikipedia POL
 src= Anas discors

Cyranka modroskrzydła (Spatula discors) – gatunek średniego ptaka wodnego z rodziny kaczkowatych (Anatidae).

license
cc-by-sa-3.0
copyright
Autorzy i redaktorzy Wikipedii
original
visit source
partner site
wikipedia POL

Pato-d'asa-azul ( Portuguese )

provided by wikipedia PT
 src=
Anas discors - MHNT

O pato-d'asa-azul ou pato-de-asa-azul (Spatula discors), também conhecida como marreca-de-asa-azul, marreca-de-asas-azuis, marreca-d'asa-azul, marreca-sará ou sará, é uma ave pertencente à família Anatidae. O macho distingue-se pelo crescente branco junto ao bico. Tanto o macho como a fêmea têm uma grande mancha azul na asa, visível em voo.[1]

Este pato nidifica na América do Norte, ocorrendo acidentalmente na Europa.

Subespécies

A espécie é monotípica (não são reconhecidas subespécies).

Referências

  1. «Anas discors» (em inglês). ITIS (www.itis.gov)

 title=
license
cc-by-sa-3.0
copyright
Autores e editores de Wikipedia
original
visit source
partner site
wikipedia PT

Pato-d'asa-azul: Brief Summary ( Portuguese )

provided by wikipedia PT
 src= Anas discors - MHNT

O pato-d'asa-azul ou pato-de-asa-azul (Spatula discors), também conhecida como marreca-de-asa-azul, marreca-de-asas-azuis, marreca-d'asa-azul, marreca-sará ou sará, é uma ave pertencente à família Anatidae. O macho distingue-se pelo crescente branco junto ao bico. Tanto o macho como a fêmea têm uma grande mancha azul na asa, visível em voo.

Este pato nidifica na América do Norte, ocorrendo acidentalmente na Europa.

license
cc-by-sa-3.0
copyright
Autores e editores de Wikipedia
original
visit source
partner site
wikipedia PT

Blåvingad årta ( Swedish )

provided by wikipedia SV
 src=
Anas discors

Blåvingad årta[2] (Spatula discors) är en amerikansk fågelart inom familjen änder.[3]

Utseende

En adult hane i praktdräkt är omisskännlig med en stor vit halvmåne vid näbbroten, grått huvud med svart panna, ljusbeige bröst och kroppsidor med grå prickar. Den har svart stjärt med en stor vit prick på sidan. När den flyger ser man de klarblå övre vingtäckarna. I flykten kan man också se att den har en mörk hand och en tvåfärgad vingspegeln i svart och grönt.

Även honan har blå övre vingtäckare, mörk hand och den tvåfärgade vingspegeln men saknar den vita halvmåneformade fläcken i ansiktet. Den har inte heller en så tydligt och jämngrå färg på huvudet utan är mer gråmellerad och har ett mörkt streck genom ögat.

Utbredning

Den häckar i Nordamerika i Alaska, Kanada och USA. Det finns några få dokumenterade häckningar i Mexiko. Den övervintrar i södra Nordamerika och i Västindien, Centralamerika och i de norra delarna av Sydamerika men några övervintrar också i ett området runt Uruguay och på Galápagosöarna.

Av de nordamerikanska änderna flyttar blåvingad årta relativt tidigt på hösten och återvänder sent. Den flyttar över långa avstånd: en individ som ringmärkts i Alberta, Kanada återfanns en månad senare i Venezuela.[4]

Blåvingad årta är en sällsynt gäst i Europa och många dokumenterade fåglar anses vara parkrymlingar. I Sverige har arten ändå setts ett flertal gånger[5] och då ansetts uppträtt spontant. Första gången den sågs i Sverige var den 26 maj 1966 i Tåkern, Östergötland.

Systematik

Tillsammans med exempelvis skedand förs blåvingad årta numera oftast till släktet Spatula.[1] Flera genetiska studier visar att dessa, liksom årta och gulkindad kricka står närmare ångbåtsänder i Tachyeres och sydamerikanska änderna i de monotypiska släktena Speculanas, Lophonetta och Amazonetta.[6][7] Några taxonomiska auktoriteter behåller dem dock fortfarande i Anas, bland annat Sveriges ornitologiska förening.

Ekologi

Blue-winged Teal häckar vid grunda dammar och i öppna våtmarker. Under flyttningen ses den hellre i insjöar och bräckt vatten än i saltvattensmiljöer. Den lever av vattenlevande insekter som kräftdjur, knottlarver, musslor och sniglar, men även växter och frön. Vintertid dominerar näckrosor, hirs och ris som föda.[4]

Honan kan ta dagar på sig att välja boplats, oftast i tät gräs minst 30 centimeter ovanför närmaste vattenlinje. Hon gör en fördjupning i marken som hon fodrar med gräs och dun. Där lägger hon sex till 14 ägg som hon ruvar i 19-29 dagar.[4]

Status och hot

Arten har ett stort utbredningsområde och en stor population, men tros minska i antal, dock inte tillräckligt kraftigt för att den ska betraktas som hotad.[1] IUCN kategoriserar därför arten som livskraftig (LC).[1]

Namn

Fågeln har på svenska även kallats amerikansk årta.[8]

Källor

  1. ^ [a b c d] BirdLife International 2012 Anas discors Från: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1 www.iucnredlist.org. Läst 6 januari 2014.
  2. ^ Sveriges ornitologiska förening (2017) Officiella listan över svenska namn på världens fågelarter, läst 2017-08-14
  3. ^ Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2017) The eBird/Clements checklist of birds of the world: Version 2017 http://www.birds.cornell.edu/clementschecklist/download, läst 2017-08-11
  4. ^ [a b c] Blue-winged Teal Faktablad om blåvingad årta på allaboutbirds.org
  5. ^ ”Blåvingad årta i SOF:s raritetskatalog”. Arkiverad från originalet den 14 november 2017. https://web.archive.org/web/20171114202446/http://birdlife.se/sveriges-ornitologiska-forening/raritetskatalogen/svanar-gass-ander/blavingad-arta/. Läst 14 november 2017.
  6. ^ Johnson, K.P., and M.D. Sorenson (1999), Phylogeny and biogeography of dabbling ducks (genus: Anas): A comparison of molecular and morphological evidence, Auk 116, 792-805.
  7. ^ Gonzalez, J., H. Düttmann and M. Wink (2009), Phylogenetic relationships based on two mitochondrial genes and hybridization patterns in Anatidae, J. Zool. 279, 310-318.
  8. ^ Tyrberg, Tommy (1996) Svenska fåglars namn, Stockholm, Sveriges ornitologiska förening

Externa länkar

license
cc-by-sa-3.0
copyright
Wikipedia författare och redaktörer
original
visit source
partner site
wikipedia SV

Blåvingad årta: Brief Summary ( Swedish )

provided by wikipedia SV
 src= Anas discors

Blåvingad årta (Spatula discors) är en amerikansk fågelart inom familjen änder.

license
cc-by-sa-3.0
copyright
Wikipedia författare och redaktörer
original
visit source
partner site
wikipedia SV

Mòng két cánh lam ( Vietnamese )

provided by wikipedia VI
 src=
Anas discors

Mòng két cánh lam, tên khoa học Spatula discors, là một loài chim trong họ Vịt.[2] Loài này hiện diện ở Bắc Mỹ, nơi nó sinh sản từ miền nam Alaska đến Nova Scotia và phía nam đến phía bắc Texas. Chúng di chuyển dọc theo bờ biển Thái Bình Dương và Đại Tây Dương và về phía nam vào các đảo Caribbea và Trung Mỹ.

Chú thích

  1. ^ BirdLife International (2012). Anas discors. Sách Đỏ IUCN các loài bị đe dọa. Phiên bản 2013.2. Liên minh Bảo tồn Thiên nhiên Quốc tế. Truy cập ngày 26 tháng 11 năm 2013.
  2. ^ Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson (2012). “The eBird/Clements checklist of birds of the world: Version 6.7.”. Truy cập ngày 19 tháng 12 năm 2012.

Tham khảo

 src= Wikimedia Commons có thêm hình ảnh và phương tiện truyền tải về Mòng két cánh lam  src= Wikispecies có thông tin sinh học về Mòng két cánh lam


Hình tượng sơ khai Bài viết liên quan đến chim này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
license
cc-by-sa-3.0
copyright
Wikipedia tác giả và biên tập viên
original
visit source
partner site
wikipedia VI

Mòng két cánh lam: Brief Summary ( Vietnamese )

provided by wikipedia VI
 src= Anas discors

Mòng két cánh lam, tên khoa học Spatula discors, là một loài chim trong họ Vịt. Loài này hiện diện ở Bắc Mỹ, nơi nó sinh sản từ miền nam Alaska đến Nova Scotia và phía nam đến phía bắc Texas. Chúng di chuyển dọc theo bờ biển Thái Bình Dương và Đại Tây Dương và về phía nam vào các đảo Caribbea và Trung Mỹ.

license
cc-by-sa-3.0
copyright
Wikipedia tác giả và biên tập viên
original
visit source
partner site
wikipedia VI

Голубокрылый чирок ( Russian )

provided by wikipedia русскую Википедию
 src=
яйцо Anas discors - Тулузский музеум

Миграции

Голубокрылые чирки совершают перелёты в стаях в Центральную и Южную Америку. Некоторые птицы зимуют на побережьях Мексиканского залива и Калифорнии. Во время перелетов некоторые птицы могут пролетать большие расстояния через открытый океан. В редких случаях они перекочевывают в Европу и выделяются жёлтыми лапами на фоне других мелких уток: коричневого чирка и чирка-трескунка.

Питание

Эти птицы добывают пищу на поверхности небольших луж на краю болот или открытых водоемов. Они едят в основном растения; их рацион может включать моллюсков и водных насекомых.

Голос

Крик самцов — короткий свист, самки издают мягкое кряканье.

Примечания

  1. Бёме Р. Л., Флинт В. Е. Пятиязычный словарь названий животных. Птицы. Латинский, русский, английский, немецкий, французский / Под общ. ред. акад. В. Е. Соколова. — М.: Рус. яз., «РУССО», 1994. — С. 30. — 2030 экз.ISBN 5-200-00643-0.
license
cc-by-sa-3.0
copyright
Авторы и редакторы Википедии

Голубокрылый чирок: Brief Summary ( Russian )

provided by wikipedia русскую Википедию
 src= яйцо Anas discors - Тулузский музеум
license
cc-by-sa-3.0
copyright
Авторы и редакторы Википедии

ミカヅキシマアジ ( Japanese )

provided by wikipedia 日本語
ミカヅキシマアジ Blue-Winged Teal.jpg
ミカヅキシマアジ(オス生殖羽) Anas discors
保全状況評価[a 1] LEAST CONCERN
(IUCN Red List Ver.3.1 (2001))
Status iucn3.1 LC.svg 分類 : 動物界 Animalia : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata : 鳥綱 Aves : カモ目 Anseriformes : カモ科 Anatidae : マガモ属 Anas : ミカヅキシマアジ A. discors 学名 Anas discors
Linnaeus, 1766 和名 ミカヅキシマアジ
(三日月縞味) 英名 Blue-winged teal

ミカヅキシマアジ(三日月縞味、Anas discors)は、鳥綱カモ目カモ科マガモ属に分類される鳥類。

分布[編集]

北緯60度以北の北アメリカ大陸で繁殖し、冬季になると北アメリカ大陸南部やウルグアイ以北の南アメリカ大陸北部へ南下し越冬する[1][2][3]

日本では1996年1月に愛知県木曽川でオス1羽が発見された例がある(迷鳥)[1][3]

形態[編集]

全長35-41センチメートル[1]。翼長オス18-19.6センチメートル、メス17.5-19.2センチメートル[2]。翼開張60-69センチメートル[1]。嘴基部に白色斑が入る[1][2][3]後肢は黄色や橙色[1][2][3]

繁殖期のオスは頭部の羽衣が紫灰色や青灰色で、嘴基部の白色斑は三日月形[1][2][3]。胴体の羽衣は褐色で、下面には黒色斑が入る[2]。雨覆は淡青色[1][2]。次列風切の光沢(翼鏡)は緑色[2][3]。非繁殖期のオス(エクリプス)やメスは全身の羽衣が褐色[1][2][3]

生態[編集]

河川湖沼に生息する[1]

主に水面で採食を行い、倒立して水中で採食することはほとんどない[2]

繁殖形態は卵生。丈が高い草原などに巣を作り、10-12個の卵を産む[2]。抱卵期間は21-24日[2]

参考文献[編集]

[ヘルプ]
  1. ^ a b c d e f g h i j 桐原政志 『日本の鳥550 水辺の鳥』、文一総合出版2000年、129頁。
  2. ^ a b c d e f g h i j k l 黒田長久、森岡弘之監修 『世界の動物 分類と飼育 (ガンカモ目)』、財団法人東京動物園協会、1980年、65-66頁。
  3. ^ a b c d e f g 真木広造、大西敏一 『日本の野鳥590』、平凡社、2000年、111頁。

関連項目[編集]

 src= ウィキメディア・コモンズには、ミカヅキシマアジに関連するメディアがあります。  src= ウィキスピーシーズにミカヅキシマアジに関する情報があります。

外部リンク[編集]

  1. ^ The IUCN Red List of Threatened Species
    • BirdLife International 2009. Anas discors. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1.
執筆の途中です この項目は、鳥類に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めていますポータル鳥類 - PJ鳥類)。
 title=
license
cc-by-sa-3.0
copyright
ウィキペディアの著者と編集者
original
visit source
partner site
wikipedia 日本語

ミカヅキシマアジ: Brief Summary ( Japanese )

provided by wikipedia 日本語

ミカヅキシマアジ(三日月縞味、Anas discors)は、鳥綱カモ目カモ科マガモ属に分類される鳥類。

license
cc-by-sa-3.0
copyright
ウィキペディアの著者と編集者
original
visit source
partner site
wikipedia 日本語