Since P. poliocephalus eats many different fruits and nectars, it is an important pollinator, especially for certain Eucalyptus species. They are also important in transporting and distributing the seeds long distances. Therefore, there is a great possibility that a population reduction of this bat would have some negative long-term impacts on the regeneration of Australia’s forests. As a result of habitat destruction decreasing their range, they have thus had a reduction in migratory patterns, which, too, may lead to negative consequences for the ecosystem and for humans.
Positive Impacts: pollinates crops
Pteropus poliocephalus is often believed to be detrimental to cultivated fruit crops, and thus farmers sometimes view the species as a pest. However, these bats only resort to eating fruit crops when other food sources become sparse. They are also thought to be a potential carrier of viral pathogens.
Negative Impacts: crop pest; causes or carries domestic animal disease
At one time P. poliocephalus had a much larger range; however, that range is now shrinking due to habitat destruction. Many areas of their habitat are becoming increasingly urbanized, such as in S.E. Queensland and northern New South Wales (NSW). Also, conservation reserves are limited, and in NSW < 15% of suitable habitat is within these reserves.
The main threat to P. poliocephalus is the destruction of habitat through deforestation. Females are particularly subject to spontaneous abortions due to loss of habitat and food sources, or when they are disturbed at the nesting site during the last few weeks of pregnancy. There are no regulations pertaining to the shooting of these animals, and farmers whose crops are perceived as being threatened often kill them. These bats also suffer from the tendency to fly into power lines, thus dying from electrocution. Black flying-foxes (Pteropus alecto) also pose a threat because they are competitors over food and habitat, and P. poliocephalus has been known to mate and thus hybridize with them.
Currently this species is listed as vulnerable under the NSW Threatened Species Conservation Act 1995, schedule 2, and under the Environment Protection and Biodiversity Conservation Act 1999. It was at one point estimated that the population numbered somewhere in the millions. Recently, however, figures indicate that the population has had an approximately 30% decline over the last 10 years. However, not all organizations view this species as being threatened. It is listed on CITES as being of least concern, and not even present in a number of other threatened and/or endangered databases.
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: vulnerable
What P. poliocephalus lacks in echolocation, it has made up for with a sophisticated array of vocalizations, which are comprised of a series of complicated squeaks and squeals. There are more than 20 different calls which these bats use in communicating with each other, and because they form large groups, roosting sites can be quite noisy.
Because they do not echolocate, they rely heavily on vision and olfaction in perceiving their environment. Their large eyes help them in navigating through their habitat. Males are known to use a strongly scented secretion in marking territory, and females are able to find their young by scent. Olfaction is also used in locating food items. Although not specifically reported, it is likely that there is important tactile communication between mothers and their young as well as between mates.
Communication Channels: visual ; tactile ; acoustic ; chemical
Other Communication Modes: scent marks
Perception Channels: visual ; tactile ; acoustic ; chemical
Measures taken of flight speed for P. poliocephalus in a wind tunnel showed values between (21 to 24 km/h); however, higher values (49, 52, and 63 km/h) indicate that at times the bats can obtain faster speeds with assistance from wind currents.
Many different fruits and pollens are consumed by P. poliocephalus, making this species highly important in seed dispersal and pollination of plants. Certain plants enjoy a wider range due to the long-distance seed dispersal that these bats offer. Without this, certain plant species could be negatively affected.
Ecosystem Impact: disperses seeds; pollinates
Foraging occurs at night, and it is not unusual for individuals to fly up to 50 km away from their campsites, although most tend to stay within 15 km. These bats tend to forage in forest canopies, open forests, rainforests, and even swamps; however, they sometimes visit cultivated gardens and fruit crops in search of food. When eating, the bats bite pieces off of their food, and then chew it vigorously, spitting out portions that are not swallowed. Different foods are eaten at different times of the year, depending on availability.
The diet of P. poliocephalus includes fruits, pollen, nectar, and bark. Their preferred food source is eucalyptus blossom, of which Eucalyptus gummifera, Eucalyptus muellerana, Eucalyptus globoidea and Eucalyptus botryoides are most often consumed. The main sources utilized for pollen consumption belong in the families Myrtaceae and Proteaceae, although pollens from other families are consumed when present. One of their favorite fruits is fig (Ficus); however, these bats have been known to consume stone fruits (e.g. peach, plum, nectarine). Occasionally they also consume the leaves of poplar (g. Populus) and grey mangrove (Avicennia marina). Other food items that have been found in fecal matter include fruits from Phoenix canariensis, Ligustrum and Solanum mauritianum, among many others.
Plant Foods: leaves; wood, bark, or stems; fruit; nectar; pollen; flowers
Primary Diet: herbivore (Frugivore )
Pteropus poliocephalus is endemic to the eastern coast of Australia. These bats can be found from Bundaberg and Mayborough in Queensland to Melbourne in Victoria. The previous range has shifted southward by approximately 750 km, possibly due to a change in climate.
Biogeographic Regions: australian (Native )
Pteropus poliocephalus is found in a variety of habitats including rainforests, woodlands, and swamps located in Eastern Australia. They are typically found at elevations less than 200 m, but have been found at elevations as great as 700 m. These bats prefer to roost in the branches of large trees. They are usually not found more than 150 km inland and are even present on some secluded islands. Because of encroachment of human activity into their habitats, they are sometimes found in suburban areas, using the agricultural lands of their human neighbors as a food source. Pteropus poliocephalus is a semi-migratory species. The migrations of these animals have been attributed to different reasons. They often go where the food supply is abundant, although it has been hypothesized that they also undertake these long-distance flights to enhance their mating opportunities, or to gather more information about other parts of their range.
Range elevation: 700 (high) m.
Habitat Regions: temperate ; tropical ; terrestrial
Terrestrial Biomes: forest ; rainforest
Wetlands: swamp
Other Habitat Features: suburban ; agricultural ; riparian
Grey-headed flying-foxes generally live for a long period of time, with the average reproductively active adult being between 6 and 10 years old. Two individuals are reported to have been 15 years old. However, the expected lifespan of wild individuals ranges from 21.6 to 59.2 months. Lifespan is affected mostly by food availability and negative human interactions, such as deforestation and culling. In captivity, where food availability is not an issue for survival, these bats have a much longer lifespan.
Range lifespan
Status: wild: 21.6 to 180 months.
Average lifespan
Status: wild: 40.4 months.
Typical lifespan
Status: wild: 21.6 to 59.2 months.
Average lifespan
Status: wild: 40.4 months.
Average lifespan
Status: captivity: 23.6 years.
Pteropus poliocephalus is the largest bat in Australia. As with all members of Pteropodidae, P. poliocephalus does not have a tail, and claws are present on the first and second digits. They do not echolocate, and therefore, the distinctive enlarged tragus or leaf-ornamentation found in most species of Microchiroptera is not present. Since they do not echolocate, they must rely on their large eyes for navigation and finding food.
As the species' common name implies, grey-headed flying-foxes have faces which are fox-like. The body is dark grey, with the fur on the head being of a lighter color grey. There is also a reddish-brown collar of fur that encircles the neck. Fur on the legs extends all the way to the ankle, which is one distinguishing characteristic from other members of the genus Pteropus. The patagium is black, and it is possible for the wingspan of some individuals to be up to one meter. The head and body length is between 230 and 289 mm, with an average of 253 mm. The forearm length is between 138 and 180 mm, with an average of 161 mm. Weight generally varies between 600 and 1000 g, with an average of 677 g. However, some individuals have been recorded as weighing more than 1 kg. These figures are somewhat different according to different sources, but they are generally within a few units of each other. These bats have a basal metabolic rate of approximately 3.162 cm^3 oxygen/h.
Range mass: 600 to 1000 g.
Average mass: 677 g.
Range length: 230 to 289 mm.
Average length: 253 mm.
Average wingspan: 1 m.
Average basal metabolic rate: 316.2 cm3.O2/g/hr.
Other Physical Features: endothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: male larger
Average basal metabolic rate: 1.768 W.
Other Pteropus species are known to be preyed upon by snakes, such as brown tree snakes (Boiga irregularis). However, beyond reports of humans killing these animals, information pertaining to specific predators of P. poliocephalus was not found.
Known Predators:
During the nursing period, males and females form monogamous mating-pairs. Males utilize strong-smelling secretions from their scapular glands (located on the shoulder) and loud calls in order to establish territories and ward off unwanted males.
Mating System: monogamous
Grey-headed flying foxes mate annually between April and May, with males reaching reproductive maturity at approximately 30 months of age. Mating has been observed throughout the year; however, males are only fertile during the mating period. Females that are close to giving birth segregate from the males. Mothers give birth to a single young between October and November, after a 6-month gestation period. Twins are extremely rare and do not usually survive in the wild. Weaning occurs between 5 and 6 months of age, and offspring are independent after about 6 months.
Breeding interval: Grey-headed flying-foxes breed once yearly.
Breeding season: Breeding occurs from April to May
Range number of offspring: 1 to 2 (rare).
Average number of offspring: 1.
Average gestation period: 6 months.
Range weaning age: 5 (low) months.
Average weaning age: 6 months.
Average time to independence: 6 months.
Average age at sexual or reproductive maturity (male): 30 months.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous
Average birth mass: 80 g.
Average number of offspring: 1.
Average age at sexual or reproductive maturity (male)
Sex: male: 540 days.
Average age at sexual or reproductive maturity (female)
Sex: female: 540 days.
When born, the young weigh between 46 and 92 grams and are somewhat altricial, as they cannot fly and have no fur on the underside. Female P. poliocephalus carry their young, which cling to the fur on the mother's belly, for the first 4 to 5 weeks after birth. Females carry their young even while foraging. For the next 12 weeks or so, the young are left at the nesting site at night while the mother forages. At about 3 months of age the young are independent enough to forage on their own; however, they are not completely weaned until about 6 months of age. This extended period of nursing is due to the fact that bats provide their young with milk until they have at least 90% of their adult wingspan and at least 70% of their adult body mass, because the young cannot achieve sustained flight until they have reached these dimensions. Females have been known to abandon their young in times of food shortages.
Although males do not directly care for the young, they do mark and defend territories for their families during the period of nursing. Thus, they play some role in protecting the young.
Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Male, Female); pre-weaning/fledging (Provisioning: Female, Protecting: Male, Female); pre-independence (Provisioning: Female, Protecting: Male, Female)
La guineu voladora de cap gris (Pteropus poliocephalus) és una espècie de ratpenat de la família dels pteropòdids. És endèmica d'Indonèsia. El seu hàbitat natural són els boscos humits tropicals, els boscos oberts, les zones boscoses, els aiguamolls de Melaleuca, els boscos de Banksia i els manglars, tot i que també se la troba a plantacions i zones urbanes si el medi és apropiat. Està amenaçada per la caça, la destrucció d'hàbitat i la competició directa amb la guineu voladora negra (P. alecto).[1]
La guineu voladora de cap gris (Pteropus poliocephalus) és una espècie de ratpenat de la família dels pteropòdids. És endèmica d'Indonèsia. El seu hàbitat natural són els boscos humits tropicals, els boscos oberts, les zones boscoses, els aiguamolls de Melaleuca, els boscos de Banksia i els manglars, tot i que també se la troba a plantacions i zones urbanes si el medi és apropiat. Està amenaçada per la caça, la destrucció d'hàbitat i la competició directa amb la guineu voladora negra (P. alecto).
Pteropus poliocephalus er en art af flagermus i familien flyvende hunde hjemmehørende i det østlige Australien. Arten har ikke et dansk navn, men kaldes på engelsk Grey-headed flying fox. Medlemmerne af slægten Pteropus er blandt verdens største flagermus. Pteropus-slægten indeholder i dag omkring 57 anerkendte arter.
Tegning af P. poliocephalus
P. poliocephalus i Royal Botanic Gardens (Sydney)
Vingefanget kan være mere end 100 centimeter
Et dyr i fangenskab
Pteropus poliocephalus er en art af flagermus i familien flyvende hunde hjemmehørende i det østlige Australien. Arten har ikke et dansk navn, men kaldes på engelsk Grey-headed flying fox. Medlemmerne af slægten Pteropus er blandt verdens største flagermus. Pteropus-slægten indeholder i dag omkring 57 anerkendte arter.
Tegning af P. poliocephalus
P. poliocephalus i Royal Botanic Gardens (Sydney)
Vingefanget kan være mere end 100 centimeter
Et dyr i fangenskab
Der Graukopf-Flughund (Pteropus poliocephalus) ist eine im östlichen Australien lebende Art aus der Gruppe der Eigentlichen Flughunde (Pteropodini) innerhalb der Flughunde (Pteropodidae).
Der Graukopf-Flughund ist eine der größten Fledermausarten, die in Australien vorkommen. Seine Flügelspannweite umfasst oft einen Meter, in einzelnen Fällen bis zu 1,5 Meter.[1] Sein Körper ist dunkelgrau, der Kopf ist hellgrau. Auffällig ist sein rotbrauner Schulterbereich. Die Flughäute sind schwarz. Wie alle Flughunde besitzt er keinen Schwanz. Klauen sitzen auf dem ersten und dem zweiten Finger. Die Art ist die einzige unter den Flughunden, bei der das Fell bis zu den Knöcheln reicht, bei anderen Arten reicht es nur bis zu den Knien.
Die Körperlänge beträgt zwischen 23 und 29 Zentimetern, durchschnittlich werden diese Flughunde 25 Zentimeter lang. Ihr Gewicht beträgt 600 bis 1000 Gramm, einige Exemplare können mehr als 1 Kilogramm erreichen. Ihr Unterarm hat eine Länge von 13,8 bis 18 Zentimetern.[2]
Der Kopf ähnelt bei dieser Untergruppe der Fledertiere in der Form dem eines Fuchses oder Hundes, was zu dem englischen Trivialnamen Flying Fox und dem deutschsprachigen Namen Flughund geführt hat. Sie orientieren sich nicht durch Echoortung mittels Ultraschall, sondern sind beim Flug auf ihre großen Augen angewiesen. Daher fehlen auch die für andere Fledertiergruppen charakteristischen Hörorgane.
Graukopf-Flughunde sind entlang der Ostküste Australiens zwischen Bundaberg in Queensland über New South Wales bis Melbourne im Bundesstaat Victoria verbreitet.[3] Sie bewohnen einen relativ schmalen Küstenstreifen, der im Norden von New South Wales bis zu den westlichen Hängen der Australischen Kordillere reicht, im Süden wird er etwas schmäler und umfasst nur die Zone östlich des Gebirges.
Das Verbreitungsgebiet hat sich in jüngster Zeit vor allem im Norden verkleinert, früher reichte es bis Rockhampton in Zentral-Queensland. Als Ursache wird die Klimaveränderung und das damit verbundene Vordringen des Schwarzen Flughundes in das Verbreitungsgebiet des Graukopf-Flughundes angesehen. Es wird angenommen, dass sich der Lebensraum, in dem der Graukopf-Flughund vorkommt, im Süden vergrößert hat, jedoch fehlen genaue Daten. Jedenfalls umfassten die Populationen des Flughundes in den 1930er Jahren noch mehrere Millionen Individuen,[4] heute sind es nur noch maximal 400.000. Allein zwischen 1989 und 2001 nahm der Bestand um 30 Prozent ab.[5]
In der Abenddämmerung verlassen sie ihre Ruheplätze – Camps genannt – und begeben sich auf Nahrungssuche. Dabei können sie in einer Nacht bis zu 50 Kilometer zurücklegen, um saisonale oder nur in bestimmten Gebieten vorkommende Futterquellen zu erreichen. Ihre Nahrung besteht aus Nektar, Pollen und Früchten verschiedener Pflanzen, beispielsweise Eukalypten, Banksien und Myrtenheiden. Sie folgen dem Menschen in die Vorstädte, wo sie sich auch von Plantagenfrüchten, etwa Mangos, Feigen oder Trauben ernähren. Sie werden daher als Schädlinge in diesen Gebieten verfolgt. Unbeliebt sind sie nahe den Siedlungen auch wegen des starken Geruchs in der Nähe der Camps, den vor allem die Männchen verbreiten. Ihre ökologische Bedeutung besteht in der Verbreitung der Pollen und Samen der Pflanzen, die sie besuchen.
Die Weibchen gebären pro Jahr nur ein Junges, das nach einer sechsmonatigen Tragzeit im Oktober oder November zur Welt kommt. In den ersten drei Wochen wird das Jungtier bei den abendlichen Flügen mitgetragen. In den darauf folgenden zwei Monaten bleiben die Jungen auf den Schlafbäumen, da sie noch nicht flugfähig sind und werden von ihren Müttern gesäugt. Erst im Alter von rund drei Monaten verlassen sie ebenfalls die Camps, sie sind aber erst mit sechs Monaten entwöhnt und ernähren sich dann selbstständig.
Der Rückgang des Bestandes ist vor allem auf die Rodung der Küstenwälder zugunsten von Siedlungen und landwirtschaftlichen Nutzflächen zurückzuführen. Von der Abholzung sind auch viele Futterpflanzen des Graukopf-Flughundes betroffen. Besonders im Winter kommt es dadurch zu Nahrungsmangel, vor allem beim Nachwuchs.[3] Störung der Schlafplätze durch den Menschen und die Verfolgung der Flughunde in der Nähe der Siedlungen kommen hinzu. Gefahr besteht auch durch Stromleitungen und Zäune, an denen sich die Tiere verletzen. Zwischen 1994 und 2002 starben an 19 Tagen, an denen die Tagestemperatur auf über 42 °C stieg, rund 24.500 Graukopf-Flughunde an Überhitzung (Hyperthermie). Am 12. Januar 2002, im australischen Sommer, waren es allein 1361 Tiere. 92 verwaiste und dehydrierte Jungtiere konnten eingesammelt und versorgt werden.[6] Die Anzahl der Tage, an denen im Süden Australiens extreme Hitze herrscht, hat sich im vergangenen Jahrzehnt erhöht. So starben allein an einem Wochenende Mitte Februar 2017 im Richmond Valley Council Tausende Graukopf-Flughunde durch Lufttemperaturen von bis zu 46 °C. Durch extreme Dehydratation fielen sie Medienberichten zufolge "einfach tot aus den Bäumen".[7]
Mit den höheren Durchschnittstemperaturen in Zusammenhang steht auch die Ausbreitung des Schwarzen Flughundes, der seit 1990 500 Kilometer weit in den Lebensraum des Graukopf-Flughundes eingedrungen ist. Das Gebiet des Schwarzen Flughundes im Norden Australiens ist durch den Frost begrenzt, der an manchen Wintertagen im Süden herrscht und von dieser Art schlecht ertragen wird. Die milderen Winter, verursacht durch die globale Erwärmung, haben jedoch diese Frostgrenze verschoben. Dadurch entsteht bei knapper werdenden Ressourcen eine weitere Nahrungskonkurrenz für den Graukopf-Flughund.
Die Art wurde daher im Jahr 2008 auf der Roten Liste der IUCN von "ungefährdet" ("least concern") auf "gefährdet" ("vulnerable") hochgestuft.[8]
Die einzigen EAZA-Halter sind in Israel, ehemalige Halter sind Antwerpen und London.[9]
Der Graukopf-Flughund (Pteropus poliocephalus) ist eine im östlichen Australien lebende Art aus der Gruppe der Eigentlichen Flughunde (Pteropodini) innerhalb der Flughunde (Pteropodidae).
The grey-headed flying fox (Pteropus poliocephalus) is a megabat native to Australia.[3] The species shares mainland Australia with three other members of the genus Pteropus: the little red P. scapulatus, spectacled P. conspicillatus, and the black P. alecto. The grey-headed flying fox is the largest bat in Australia.
The grey-headed flying fox is endemic to the south-eastern forested areas of Australia, principally east of the Great Dividing Range. Its range extends approximately from Bundaberg in Queensland to Geelong in Victoria, with outlying colonies in Ingham and Finch Hatton in the north, and in Adelaide in the south. In the southern parts of its range it occupies more extreme latitudes than any other Pteropus species.
As of 2021 the species is listed as "Vulnerable" on the IUCN Red List of Threatened Species.[1]
A description of the species was published by Coenraad Temminck in his 1825 monograph of mammals. Hybridisation with the species Pteropus alecto has been noted where their ranges intersect.[3]
The common names for Pteropus poliocephalus include grey-headed kalong.[4] The entry in Gould's Mammals of Australia (1863) gave the bat the title grey-headed vampire.[5]
The grey-headed flying fox is the largest bat in Australia, with the adult wingspan reaching up to 1 m (3 ft 3 in) in length and weighing up to 1 kg (2.2 lb).[6] Weight generally varies between 600 and 1,000 g (21 and 35 oz), with an average of 700 g (25 oz). The combined length of the head and body is from 230 to 290 mm. The forearm length is a range from 138 to 180 mm. The length of the ear from the tip to base is 30 to 37 mm.[7]
The overall colour of the pelage is a dark-grey body with a light-grey head, separated by a reddish-brown collar. The fur on the body is long and streaked with grey, the broad and well defined collar completely encircles the neck with hair that is golden orange in tone. A unique characteristic among bats of the genus Pteropus is fur on the legs that extends all the way to the ankle.[7]
Like many megachiropterans, the species lacks a tail. All of these bats possess claws on its first and second digits. The head is simple in form, with the characteristic 'dog-like' appearance of the genus. Since it does not echolocate, it lacks the tragus or leaf ornamentation found in many species of Microchiroptera. It relies on smell and, predominately, sight to locate its food (nectar, pollen and native fruits) and thus has relatively large eyes for a bat.
The voice of P. poliocephalus consists of a complex series of squeals and screechings.[7] They will flap their wings in hot weather, using blood pumped through the patagium to cool the body temperature.[8]
The grey-headed flying fox is long-lived for a mammal of its size. Individuals reportedly survived in captivity for up to 23 years, and a maximum age of up to 15 years seems possible in the wild.
The distribution range is at the eastern regions of the Australian continent, mostly within 200 kilometres of the coast, from Gladstone in Queensland through to the southern Gippsland region and populations around the city of Melbourne. The breeding range has been recorded as progressing southward, the temperate climate of Melbourne and Geelong and no further north than Maryborough, Queensland.[7]
Urbanisation may displace the species, or provide habitat that accommodates their feeding or roosting preferences. The city of Brisbane has many roosts occupied by the species; a famous colony at the Indooroopilly Island is noted for the evening departure of the bats across the local river. Within the central business district of Sydney, they can be seen travelling along city streets to feed at Moreton Bay fig trees at Hyde Park.[9] The species was recorded as an occasional visitor to the national capital Canberra, although the flowering eucalypts at Commonwealth Park have seen more permanent camps established close to the city.[10]
The species was surveyed during the 1920s by Francis Ratcliffe, who recorded the populations in estimates of quarter, half, or one million in camps, generally located around 40 kilometres apart. These numbers have greatly declined since this first survey.[11]
Grey-headed flying foxes live in a variety of habitats, including rainforests, woodlands, and swamps.[12] These camps are variable in size and are seasonally relocated; the warmer parts of the year find them occupying cool and wet gullies in large groups.[7] During the day, individuals reside in large roosts (colonies or 'camps') consisting of hundreds to tens of thousands of individuals. Colonies are formed in seemingly arbitrary locations. Roost vegetation includes rainforest patches, stands of melaleuca, mangroves, and riparian vegetation, but roosts also occupy highly modified vegetation in urban areas. A prominent example existed for many years at the Royal Botanic Gardens in Sydney. However, the botanic gardens instituted a controversial policy to remove them from the garden grounds. The camp is now dispersed across Queensland.[13][14]
Movements of grey-headed flying foxes are influenced by the availability of food. Their population is very fluid, as they move in response to the irregular blossoming of certain plant species. They are keystone pollinators and seed dispersers of over 100 species of native trees and plants.[15] The grey-headed flying fox is a partial migrant that uses winds to facilitate long-distance movement. It does not migrate in a constant direction, but rather in the direction that will be the most beneficial at the time.[16]
Although recorded in small numbers sporadically throughout the 20th century, it was not until the 1980s that grey-headed flying foxes routinely visited Melbourne,[17] with a permanent camp since the 1990s. Their residence at the Melbourne Botanic Garden was the subject of controversy, and the bats were eventually discouraged and moved to Yarra Bend at the city's river. The camp at this site was decimated during a heat wave, requiring its rehabilitation to sustain the relocated population. The forced relocations are also said to have led to the discovery of the orchards of the Goulburn Valley.[18] Similarly, the first recorded permanent camp in Adelaide was established in 2010. The spread is likely due to global warming, habitat loss and drought; while the location of the new camps appears to be in response to urbanisation: a reliable food supply[19] (such as native eucalypt plantings and backyard fruit trees) and warmer temperatures due to climate change and urban heat islands.[17][20]
Around dusk, grey-headed flying foxes leave the roost and travel up to 50 km a night to feed on pollen, nectar and fruit.[16] The species consumes fruit flowers and pollens of around 187 plant species.[21] These include eucalypt, particularly Corymbia gummifera, Eucalyptus muelleriana, E. globoidea and E. botryoides,[12][22] and fruits from a wide range of rainforest trees, including members of the genus Ficus.[12][22] These bats are considered sequential specialists, since they feed on a variety of foods.[22] Grey-headed flying foxes, along with the three other Australian flying fox species, fulfill a very important ecological role by dispersing the pollen and seeds of a wide range of native Australian plants. The grey-headed flying fox is the only mammalian nectarivore and frugivore to occupy substantial areas of subtropical rainforests, so is of key importance to those forests.
The teeth, tongue and palate of the pteropodid bats are able to extract plant juices from food, only swallowing smaller seeds of the meal. Incisors hold items such as fruit, and the fibrous material is ejected from the mouth after it is masticated and the juice is swallowed; larger seeds may be held in the mouth and dispersed several kilometres from the tree. The need for the elaborate intestinal tract of most herbivores is consequently removed. Some fruiting plants produce food for flying-foxes, and P. poliocephalus is attracted to the scent of their flowers and fruit and is able to locate the pale colour that indicates the source; the fruit and blooms of species that attract birds in the daylight are usually contrasting reds and purples. The food source is also presented away from the foliage that may obstruct the bat's access.[23]
Most of the trees on which this species forages produce nectar and pollen seasonally and are abundant unpredictably, so the flying fox's migration traits cope with this. The time when flying foxes leave their roosts to feed depends on foraging light and predation risk. Flying foxes have more time and light when foraging if they leave their roosts early in the day. The entire colony may leave later if a predatory bird is present, while lactating females leave earlier. With males, the bachelors leave earlier than harem-holding males, which guard and wait until all their females have left. The flying foxes that leave the roost earlier are more vulnerable to predation, and some flying foxes will wait for others to leave, a phenomenon labelled the "after you" effect.[24]
Grey-headed flying foxes form two different roosting camps, summer camps and winter camps.[25] Summer camps are used from September to April or June. In these camps, they establish territories, mate, and reproduce.[25] Winter camps are used from April to September. The sexes are separated in winter camps and most behaviour is characterised by mutual grooming.[25] Summer camps are considered "main camps", while winter camps are referred to as "transit camps".[25]
In their summer camps, starting in January, male grey-headed flying foxes set up mating territories. Mating territories are generally 3.5 body lengths along branches.[26] These flying foxes' neck glands enlarge in males in the mating season, and are used to mark the territories.[26] The males fight to maintain their territories, and this is associated with a steep drop in the males' body condition during this time.[27][28] Around the beginning of the mating season, adult females move from the periphery towards the central male territories where they become part of short-term 'harems' that consist of a male and an unstable group of up to five females.[26] Centrally located males are polygamous, while males on the periphery are monogamous or single.[25][26] The mating system of the grey-headed flying fox is best described as a lek because males do not provide any essential resources to females and are chosen on the basis of their physical location within the roost, which correlates with male quality.[26]
Matings are generally observed between March and May, but the most likely time of conception is April.[29] Most mating takes place in the territories and during the day. Females have control over the copulation process, and males may have to keep mating with the same females.[30] Females usually give birth to one young each year.[31] Gestation lasts around 27 weeks,[32] and pregnant females give birth between late September and November. Late births into January are sometimes observed. The altricial newborns rely on their mothers for warmth.[33] For their first three weeks, young cling to their mothers when they go foraging. After this, the young remain in the roosts. By January, young are capable of sustained flight, and by February, March or April are fully weaned.
Flying foxes are preyed on by eagles, goannas and snakes.[25]
The camps of P. poliocephalus attract a number of larger predators. including both terrestrial and aerial hunters. The sea eagle Haliaeetus leucogaster will capture these bats in flight as they leave their roosts. The snake species Morelia spilota is frequently found as a resident at these camps, lazily selecting an individual from the apparently unconcerned group at a branch. The bat is seized in the jaws and encircled by the python's body, then swallowed head first to be digested over the next week.[34] The species was reported by John Gould as being eaten by the indigenous Australians.[5]
The grey-headed flying fox is now a prominent federal conservation problem in Australia. Early in the last century, the species was considered abundant, with numbers estimated in the many millions. In recent years, though, evidence has been accumulating that the species is in serious decline. An estimate for the species in 2019 put the number at 586,000[35] and the national population may have declined by over 30% between 1989 and 1999 alone.[36]
Grey-headed flying foxes are exposed to several threats, including loss of foraging and roosting habitat,[37] competition with the black flying fox, and mass die-offs caused by extreme temperature events.[26] When present in urban environments, grey-headed flying foxes are sometimes perceived as a nuisance. Cultivated orchard fruits are also taken, but apparently only at times when other food items are scarce. Because their roosting and foraging habits bring the species into conflict with humans, they suffer from direct killing of animals in orchards and harassment and destruction of roosts. Negative public perception of the species has intensified with the discovery of three recently emerged zoonotic viruses that are potentially fatal to humans: Hendra virus, Australian bat lyssavirus and Menangle virus.[38] However, only Australian bat lyssavirus is known from two isolated cases to be directly transmissible from bats to humans. No person has ever died from ABLV (Lyssavirus) after having had the ABLV post-exposure vaccine.[39]
The urbanised camps of cities were noted as succumbing to poisoning during the 1970s to 1980s, identified as the lead in petrol that would accumulate on the fur and enter the body when grooming. The mortality rate from toxic levels of lead in the environment dropped with the introduction of unleaded fuel in 1985. An introduced plant, the cocos palm Syagrus romanzoffiana, now banned by some local councils, bears fruit that is toxic to this species and has resulted in their death; the Chinese elm Ulmus parvifolia and privet present this same hazard. The species is vulnerable to diseases that may kill large numbers within a camp, and the sudden incidence of premature births in colonies is likely to significantly impact the re-population of the group; the cause of these disorders or diseases in unknown.[40]
Recent research has shown, since 1994, more than 24,500 grey-headed flying foxes have died from extreme heat events alone.[41] Unsuitable backyard fruit tree netting also kills many animals and may bring them into close contact with humans, but can be avoided by using wildlife-safe netting. Barbed wire accounts for many casualties; this can be ameliorated by removing old or unnecessary barbed wire or marking it with bright paint.[39][11]
The early twentieth century saw the incursion of Pteropus poliocephalus to the opportunities they discovered at orchards, and the government placed a bounty on the declared pest.[40] Their reputation for destroying fruit crops was noted by John Gould in 1863,[5] though the extent of actual damage was often greatly exaggerated. When Ratcliffe submitted his report, he noted the number of paid bounties was 300,000, and this would not have included the mortally wounded escapees or those left suspended at roosts by the grip that is held by their weight. This species continued to be killed or wounded by shotguns, many remaining disabled where they fell after the bounty was stopped, despite the advice of Ratcliffe and later researchers on an ineffective and uneconomical practice and the needless extermination of the population. Orchardists have begun shifting to the use of netting that also discourages the daytime visits of birds. The impact of indiscriminate shooting of bats has resulted in the species being declared vulnerable to extinction, to the tree species that relied on them for regeneration, the subsequent alteration to the forest ecology of the eastern states[40]
To answer some of the growing threats, roost sites have been legally protected since 1986 in New South Wales and since 1994 in Queensland. In 1999, the species was classified as "Vulnerable to extinction" in The Action Plan for Australian Bats,[42] and has since been protected across its range under Australian federal law, listed as Vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). A species recovery plan was created by the federal Department of Agriculture, Water and the Environment and the South Australian Department for Environment and Water and published in 2021.[43][44]
As of 2021 the species is listed as "Vulnerable" on the IUCN Red List of Threatened Species under criteria A2ace and A4ac. Justification for the assessment says that "although the population is relatively large (exceeding 10,000 mature individuals) and it has a large extent of occurrence (> 20,000 km²), a continuing population decline is inferred to be more than 30–35% over the last three generations", and that further decline is expected.[1]
Baby flying foxes usually come into care after having been separated from their mothers. Babies are often orphaned during four to six weeks of age, when they inadvertently fall off their mothers during flight, often due to disease or tick paralysis (their own and/or that of the mother).[45]
Bat caregivers are not only specially trained in techniques to rescue and rehabilitate bats, but they are also vaccinated against rabies. Although the chance of contracting the rabies-like Australian bat lyssavirus is extremely small, bat caregivers are inoculated for their own protection.
Grey-headed vampire by Henry Richter 1863.
Illustration of grey-headed flying fox by Neville W. Cayley (1887–1950)
Grey-headed flying foxes in Royal Botanic Gardens, Sydney
Grey-headed flying fox with baby (the smaller bat in the back is a little red flying fox
Grey-headed flying fox in flight
A 17-day-old female grey-headed flying fox in care of WIRES
Young female grey-headed flying fox in care of WIRES
Young female grey-headed flying fox playing with her WIRES caretaker
Grey-headed flying fox in captivity
Taking off.
Grey-headed flying fox at Parramatta Park, NSW, Australia
Attribution 4.0 International (CC BY 4.0) licence. The grey-headed flying fox (Pteropus poliocephalus) is a megabat native to Australia. The species shares mainland Australia with three other members of the genus Pteropus: the little red P. scapulatus, spectacled P. conspicillatus, and the black P. alecto. The grey-headed flying fox is the largest bat in Australia.
The grey-headed flying fox is endemic to the south-eastern forested areas of Australia, principally east of the Great Dividing Range. Its range extends approximately from Bundaberg in Queensland to Geelong in Victoria, with outlying colonies in Ingham and Finch Hatton in the north, and in Adelaide in the south. In the southern parts of its range it occupies more extreme latitudes than any other Pteropus species.
As of 2021 the species is listed as "Vulnerable" on the IUCN Red List of Threatened Species.
Pteropus poliocephalus es un murciélago de gran tamaño, perteneciente a la familia Pteropodidae, que se encuentra en Australia.[1][2]
Datos: Q551930
Multimedia:
Especies: Pteropus poliocephalus
Pteropus poliocephalus es un murciélago de gran tamaño, perteneciente a la familia Pteropodidae, que se encuentra en Australia.
Pteropus poliocephalus Pteropus generoko animalia da. Chiropteraren barruko Pteropodidae familian sailkatuta dago.
Pteropus poliocephalus Pteropus generoko animalia da. Chiropteraren barruko Pteropodidae familian sailkatuta dago.
Le renard volant à tête grise, ou roussette à tête grise (Pteropus poliocephalus) est une chauve-souris frugivore originaire d'Australie[2].
L'espèce partage l'Australie continentale avec trois autres membres du genre Pteropus : le petit renard volant, le renard volant à lunettes et le renard volant noir.
C'est la plus grande des chauves-souris australiennes[3].
Le renard volant australien peut mesurer entre 30 et 50 cm avec 1,5 à 1,7 m d'envergure. Il pèse entre 1 et 1,5 kg.
Herbivore, le renard volant se nourrit de pollen, de nectar ou bien de fruits.
Le renard volant à tête grise est endémique dans les zones forestières du Sud-Est de l'Australie, principalement à l'est de la Cordillère australienne. Son aire de répartition s'étend approximativement de Bundaberg dans le Queensland, à Geelong dans l'État de Victoria, avec de vastes colonies périphériques à Ingham et Finch Hatton (en) au nord, et à Adélaïde au sud. Dans les parties méridionales de son aire de répartition, il occupe des latitudes plus extrêmes que toute autre espèce de Pteropus.
On peut la retrouver dans zones humides de la côte Est australienne (mangroves et forêts humides).
Le renard volant à tête grise, ou roussette à tête grise (Pteropus poliocephalus) est une chauve-souris frugivore originaire d'Australie.
L'espèce partage l'Australie continentale avec trois autres membres du genre Pteropus : le petit renard volant, le renard volant à lunettes et le renard volant noir.
C'est la plus grande des chauves-souris australiennes.
La volpe volante dalla testa grigia (Pteropus poliocephalus Temminck, 1825) è un pipistrello appartenente alla famiglia degli Pteropodidi, diffuso in Australia.[1][2].
Pipistrello di grandi dimensioni, con la lunghezza della testa e del corpo tra 230 e 289 mm, la lunghezza dell'avambraccio tra 130 e 180 mm e un peso fino a 1 kg.
La pelliccia è lunga e densa. Le parti dorsali variano dal bruno-olivastro al grigio scuro talvolta densamente cosparse di peli argentati, quelle ventrali sono più chiare, il collare è fulvo, mentre la testa è grigio chiara brizzolata. Il muso è lungo ed affusolato, gli occhi sono grandi. Le orecchie sono lunghe ed appuntite. La tibia è densamente ricoperta di peli fino alle caviglie. Le membrane alari sono attaccate lungo i fianchi del corpo. È privo di coda, mentre l'uropatagio è ridotto ad una sottile membrana lungo la parte interna degli arti inferiori. Effettua una muta nel mese di giugno, passando da una fase più scura ad una più chiara.
Forma grandi colonie su alberi spogli, tra la densa vegetazione in prossimità di specchi d'acqua come fiumi, laghi o lungo le coste e in parchi e giardini all'interno di ambienti urbani e suburbani. Solitamente frequenta gli stessi siti per diverso tempo.
La dieta consiste in fiori e frutti di diverse specie di piante coltivate e native, tra le quali principalmente molte specie di Eucalipto[3].
Gli accoppiamenti avvengono tra marzo e aprile. Le femmine danno alla luce un piccolo all'anno tra settembre ed ottobre. Entrambi i sessi raggiungono la maturità sessuale dopo circa 18 mesi di vita. L'allattamento dura tra 5 e 6 mesi, sebbene i piccoli possano già volare dopo appena 8-10 settimane dalla nascita. L'aspettativa di vita in natura è fino a 18 anni[3].
Questa specie è diffusa in Australia, negli stati del Queensland sud-orientale, e lungo le coste del Nuovo Galles del Sud e Victoria.[1]
Vive nelle foreste tropicali umide, Mangrovie, Savane e piantagioni di frutta. È stato osservato anche in aree urbane dove sono disponibili cibo e siti dove riposare.
In accordo alla suddivisione del genere Pteropus effettuata da Andersen[4], P. poliocephalus è stato inserito nello P. macrotis species Group, insieme a P. macrotis stesso. Tale appartenenza si basa sulle caratteristiche di non avere un ripiano basale nei premolari e di avere orecchie lunghe ed appuntite.
Altre specie simpatriche dello stesso genere: P. alecto, P. scapulatus.
La IUCN Red List, considerato il lento declino della popolazione, ridotto del 30% negli ultimi 15 anni, e la probabile competizione ed ibridizzazione con P. alecto, classifica P. poliocephalus come specie vulnerabile (VU).[1]
La volpe volante dalla testa grigia (Pteropus poliocephalus Temminck, 1825) è un pipistrello appartenente alla famiglia degli Pteropodidi, diffuso in Australia..
De grijskopvleerhond (Pteropus poliocephalus) is een vleermuis uit het geslacht Pteropus die voorkomt in Zuidoost-Australië, van Gladstone (Queensland) tot Melbourne (Victoria), meestal op niet meer dan 200 km van de kust.
De grijskopvleerhond is de grootste vleermuis van Australië; de vleugelspanwijdte bedraagt tot 1 m. De vacht is lang en grijs, met een brede oranje band om de hals. De kop is wat lichter van kleur. Ook de poten zijn behaard. De kop-romplengte bedraagt 230 tot 290 mm, de voorarmlengte 138 tot 180 mm, de oorlengte 30 tot 37 mm en het gewicht 600 tot 1000 g.
In de zomer vormt deze soort vaak grote koloniën, meestal in dicht bos, maar 's winters komt het dier meer verspreid voor. De paring vindt in maart of april plaats; daarna wordt er in oktober of november een enkel jong geboren.
De grijskopvleerhond (Pteropus poliocephalus) is een vleermuis uit het geslacht Pteropus die voorkomt in Zuidoost-Australië, van Gladstone (Queensland) tot Melbourne (Victoria), meestal op niet meer dan 200 km van de kust.
De grijskopvleerhond is de grootste vleermuis van Australië; de vleugelspanwijdte bedraagt tot 1 m. De vacht is lang en grijs, met een brede oranje band om de hals. De kop is wat lichter van kleur. Ook de poten zijn behaard. De kop-romplengte bedraagt 230 tot 290 mm, de voorarmlengte 138 tot 180 mm, de oorlengte 30 tot 37 mm en het gewicht 600 tot 1000 g.
In de zomer vormt deze soort vaak grote koloniën, meestal in dicht bos, maar 's winters komt het dier meer verspreid voor. De paring vindt in maart of april plaats; daarna wordt er in oktober of november een enkel jong geboren.
Pteropus poliocephalus[2][3][4] är en däggdjursart som beskrevs av Coenraad Jacob Temminck 1825. Pteropus poliocephalus ingår i släktet Pteropus och familjen flyghundar.[5][6] IUCN kategoriserar arten globalt som sårbar.[1] Inga underarter finns listade.[5]
Denna flyghund förekommer i östra och sydöstra Australien. Habitatet utgörs av skogar, mangrove, andra områden med träd och fruktodlingar. Arten äter blommor samt några frukter. Individerna vilar i växtligheten där de bildar större kolonier. Per kull föds en unge.[1]
Wikimedia Commons har media som rör Pteropus poliocephalus.
Wikispecies har information om Pteropus poliocephalus.
Pteropus poliocephalus är en däggdjursart som beskrevs av Coenraad Jacob Temminck 1825. Pteropus poliocephalus ingår i släktet Pteropus och familjen flyghundar. IUCN kategoriserar arten globalt som sårbar. Inga underarter finns listade.
Denna flyghund förekommer i östra och sydöstra Australien. Habitatet utgörs av skogar, mangrove, andra områden med träd och fruktodlingar. Arten äter blommor samt några frukter. Individerna vilar i växtligheten där de bildar större kolonier. Per kull föds en unge.
Довжина голови і тіла: 230–289 мм. Довжина передпліччя: 138–180 мм. Середня розмах крил: 1 м. Вага 600–1000 гр. Має темно-сіре тіло, блідо-сіру голову і помітний комір з червонуватого кольору шерсті, який охоплює шию. Як і всі члени родини Pteropodidae, цей крилан не має хвоста і має кігті на першому і другому пальцях. Унікальним, однак, є те, що шерсть цього виду простягається аж до щиколотки, що відрізняють його від інших Pteropus видів, у яких шерсть поширюється вниз до колін.
Ендемік Австралії, де розповсюджений від південно-східного Квінсленду, через східний Новий Південний Уельс до штату Вікторія. Він живе в тропічних вологих лісах, відкритих лісах, закритих та відкритих лісах, мангрових заростях і комерційних плантаціях фруктів. Зустрічається також у міських районах, де є відповідні місця для годування і спочинку.
Основним джерелом живлення є пилок і нектар евкаліпта, а також плоди в тропічних лісах. Лаштує сідала в колонії на ділянках з деревами і густою рослинністю. Спочивають у великих колоніях, або «таборах», до десятків тисяч особин протягом дня. У сутінках ці крилани вилітають з колонії в пошуках їжі, до якої подорожують до 50 кілометрів. Як важливі запилювачі й розсіювачі насіння, ці крилани є невід'ємною частиною підтримки здорового стану лісових екосистем.
Розмноження має сезонний характер, і з січня самці захищають території спаровування, які вони розмежовують запаховим маркуванням, гучними криками і агресією. Парування зазвичай відбувається в період з березня по травень. Самиці зазвичай народжують одне дитинча через шість місяців в період з вересня по листопад. Самиці носять їх дитя під час польотів по харчі протягом перших трьох тижнів, після чого їх залишають у таборі. Молодь здатна до польоту і слідувати за їх матір'ю до харчів через три місяці, але ще годується молоком до п'яти–шести місяців.
Найсерйознішою загрозою є знищення місць харчування і спочинку через розширення урбанізації та сільського господарства. Зміна клімату може також становити загрозу, оскільки кліматичні моделі передбачають значне збільшення числа екстремальних температур і були зафіксовані випадки масової загибелі цих криланів, коли в їх сідалах температура перевищувала 42 градуса за Цельсієм. Іншою серйозною загрозою є прямим убивством тварин в садах. Багато фермерів сприймають рукокрилих як шкідників сільськогосподарських культур і часто вбивають їх. Існує також тенденція цих кажанів влітати в лінії електропередач і вмирати від електричного струму. Чорний крилан (Pteropus alecto) створює додаткову загрозу шляхом конкуренції за їжу і середовище проживання, а також гібридизації.
У відповідь на ці зростаючі загрози, місця спочинку були захищені законом з 1986 року в Новому Південному Уельсі й з 1994 в штаті Квінсленд. P. poliocephalus внесений до списку вразливих відповідно до Закону про охорону навколишнього середовища та збереження біорізноманіття в 1999 році, й у Новому Південному Уельсі занесений до категорії виду під загрозою зникнення у 1995 році.
Pteropus poliocephalus là một loài động vật có vú trong họ Dơi quạ, bộ Dơi. Loài này được Temminck mô tả năm 1825.[2]
Phương tiện liên quan tới Pteropus poliocephalus tại Wikimedia Commons
Bài viết họ Dơi quạ này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Pteropus poliocephalus là một loài động vật có vú trong họ Dơi quạ, bộ Dơi. Loài này được Temminck mô tả năm 1825.
회색머리날여우박쥐(Pteropus poliocephalus)는 큰박쥐과에 속하는 박쥐의 일종이다.[2] 오스트레일리아의 토착종이다. 왕박쥐속에 속하는 다른 3종 작은붉은날여우박쥐(P. scapulatus)와 안경날여우박쥐(P. conspicillatus), 검은날여우박쥐(P. alecto)와 함께 오스트레일리아 대륙에 나누어 분포한다. 회색머리날여우박쥐는 주로 그레이트디바이딩 산맥의 동부 지역의 오스트레일리아 남부-동부 숲에서 서식한다. 분포 지역은 퀸즐랜드주 번다버그부터 빅토리아주 절롱까지, 잉햄에서 떨어진 여러 부락과 북쪽으로 핀치 해튼 협곡, 그리고 남쪽으로 애들레이드까지 지역이다. 분포 지역의 남쪽 부분은 다른 왕박쥐속 종들보다 더 고위도 지방을 차지하고 있다.
회색머리날여우박쥐는 오스트레일리아에서 가장 큰 박쥐이다. 연한 회색 머리와 불그스레한 갈색 목 깃 털과 함께 진한 갈색을 띤다. 왕박쥐속에 속하는 박쥐 중에서 독특한 박쥐로 다리의 털이 멀리 발목까지 이어진다. 다 자란 박쥐의 평균 날개 폭은 최대 1m이고, 몸무게는 최대 1kg이다. 머리부터 몸까지 몸길이는 230~289mm이고, 평균 253mm이다. 전완장은 138~180mm이고, 평균 161mm이다. 몸무게는 일반적으로 600g과 1000g 사이로 다양하며, 평균 677g 정도이다. 꼬리는 없고 첫번째와 두번째 발가락에 발톱이 있다. 반향 정위를 하지 않기 때문에, 대부분의 작은박쥐류 종에서 발견되는 이주 또는 잎 장식 기관이 없다. 먹이(꽃꿀과 꽃라루 그리고 천연 과일) 위치를 찾을 때 시력에 의존하며, 그래서 비교적 큰 눈을 갖고 있다. 같은 크기의 포유류 중에서 수명이 길다. 포획 상태에서 최대 23년을 살며 야생에서 최대 15년을 사는 것으로 추정하고 있다.
회색머리날여우박쥐(Pteropus poliocephalus)는 큰박쥐과에 속하는 박쥐의 일종이다. 오스트레일리아의 토착종이다. 왕박쥐속에 속하는 다른 3종 작은붉은날여우박쥐(P. scapulatus)와 안경날여우박쥐(P. conspicillatus), 검은날여우박쥐(P. alecto)와 함께 오스트레일리아 대륙에 나누어 분포한다. 회색머리날여우박쥐는 주로 그레이트디바이딩 산맥의 동부 지역의 오스트레일리아 남부-동부 숲에서 서식한다. 분포 지역은 퀸즐랜드주 번다버그부터 빅토리아주 절롱까지, 잉햄에서 떨어진 여러 부락과 북쪽으로 핀치 해튼 협곡, 그리고 남쪽으로 애들레이드까지 지역이다. 분포 지역의 남쪽 부분은 다른 왕박쥐속 종들보다 더 고위도 지방을 차지하고 있다.
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