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Conservation Status

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A common and widespread species; no concerns.
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Cyclicity

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Open woodland, woodland edges and clearings, shrub stands, etc.
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Distribution

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Newfoundland west to Yukon and central British Columbia, south to Florida, Missisissippi, Texas, New Mexico and Arizona. It occurs in wooded areas throughout Alberta.
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General Description

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A medium-sized (5.0-7.0 cm wingspan) sphinx moth with pale grey forewings with darker grey and black markings. Hindwings are pink hindwings with a wide white border and a large black spot in the anal angle, which contains two parallel blue spots or bars. It can be confused only with the One-eyed Sphinx, which is larger and has a more complex dark pattern on the forewings. The combination of the two blue bars in the hindwing spot (a circle in the One-eyed sphinx) and the sharp border between the pink and the pale ground of the hindwing (shading together in One-eyed sphinx) will identify the Twin-spot Sphinx. Male Twin-spot sphinx also have much longer pectinations of the antennae than do males of One-eyed sphinx. cc-by-nc
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Habitat

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Adults have been collected in Alberta from early May through mid-July.
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Life Cycle

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The Twin-spot Sphinx rivals the One-eyed Sphinx in its beauty. Although not quite as common, it is found in the same habitats, and the two species are often collected together. Like the One-eyed, the Twin-spot comes to light. It is never (?) found nectaring at flowers, even at dusk, as are some other species of sphinx. The larvae are solitary defoliators and there appears to be a single brood each year.
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Trophic Strategy

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No Alberta data; elsewhere reported larval hosts include willows (Salix), ash (Fraxinus), birch (Betula), plum and choke cherry (Prunus), pears (Pyrus), elm (Ulmus) and Poplar (Populus). Willows appears to be the preferred host.
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Smerinthus jamaicensis

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Smerinthus jamaicensis, the twin-spotted sphinx, is a moth of the family Sphingidae. The species was first described by Dru Drury in 1773.

Distribution

It is widely distributed across North America. It has been taken as far north as the Yukon.[2]

Description

It has a wingspan of 1+343+14 inches (4.5–8.3 cm), with the outer margins of the forewings unevenly scalloped, but with the coastal margin of the hindwings being almost straight. Males have gray with black and white markings on their forewings, while females are yellowish brown with dark brown and white markings.

Both sexes have red hindwings with a pale yellow border. Sometimes a blue patch may appear as a single eyespot or it may be divided by black bands, creating two or three eyespots. Adult moths are nocturnal, but seem to prefer the earlier part hours of the night.

Biology

The larvae feed on apple (Malus sylvestris), Prunus species (such as plums and peach), ash (Fraxinus), elm (Ulmus), poplar (Populus), birch (Betula), and willow (Salix).

See also

References

  1. ^ "CATE Creating a Taxonomic eScience - Sphingidae". Cate-sphingidae.org. Retrieved 2011-11-01.
  2. ^ "Smerinthus jamaicensis (Drury, 1773)". Sphingidae of the Americas. Archived from the original on 2015-05-12. Retrieved 2011-11-01.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Smerinthus_jamaicensis&oldid=1032581719"
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Smerinthus jamaicensis: Brief Summary

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Smerinthus jamaicensis, the twin-spotted sphinx, is a moth of the family Sphingidae. The species was first described by Dru Drury in 1773.

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