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Conservation Status

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No concerns.
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Cyclicity

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Adults have been collected in Alberta April through June, with the peak flight in late May and June.
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Distribution

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From the Atlantic coast to Vancouver Island, mainly south of the boreal forest but widespread in the mountains, south to Texas and northern Mexico. In Alberta, it occurs in open meadows north into the southern edge of the Boreal forest, but is most common in the foothills.
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General Description

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A medium-size (3.5-5 cm wingspan) day-flying moth with translucent wings with narrow dark margins and the veins lined with dark scales. The forewing apex and base are red-brown. Both the head and thorax are olive-brown, the basal half of the abdomen is black with steel-blue patches and the posterior half is yellow, tipped with black. The larger Hummingbird Clearwing has wider margins on the wings, and dark olive brown, not yellow, patches on the abdomen. The Slender Clearwing (H. gracilis) is restricted to the boreal forest region, and lacks scaling in the forewing cell. Although not yet confirmed for Alberta, the very similar H. senta should be watched for in the mountains. "Most of the diagnostic characters (for separating senta and diffinis) are trends but some are fairly good. In senta, the first two abdominal segments are black and the next three segments are yellow (dorsally), while in diffinis the tendency is for the first three segments to be black and the next two segments are yellow (dorsally). In senta, the ventrum of the abdomen is almost all yellow except the black anal tuft and the legs are yellow, while in diffinis the ventrum of the abdomen has significant black and the legs are black... in addition, there is a black stripe running across the thorax from the eyes to the abdomen" (J. Tuttle, pers. corr., September 2001).
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Habitat

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Open areas including meadows, clearings, roadsides and woodland edges.
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Life Cycle

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The Snowberry Clearwing is diurnal and is most often encountered nectaring at spring flowers, including dandelions and lilacs. They are more of a grassland and open meadow species than the Hummingbird and Slender Clearwings. Snowberry Clearwings are rarely encountered when not on the wing, they look more like bees than moths. When the adults first emerge from the pupae, the wings are completely scaled, but most scales are loosely attached and fall off during the initial flight, leaving much of the wing translucent. There appears to be a single brood each year.
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Trophic Strategy

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No Alberta data; elsewhere the reported larval hosts are Snowberry (Symphoricarpos occidentalis, S. racemosus, and S. mollis), and Honeysuckle (Lonicera nitida). Adults visit many species of flowers for nectar.
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Hemaris diffinis

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Hemaris diffinis, the snowberry clearwing, is a moth of the order Lepidoptera, family Sphingidae. This moth is sometimes called "hummingbird moth" or "flying lobster". This moth should not be confused with the hummingbird hawk-moth of Europe.

Adults

It is about 32–51 millimetres (1.25–2 in). The moth's abdomen has yellow and black segments much like those of the bumblebee, for whom it might be mistaken due to its color and flight pattern similarities. The moth's wings lack the large amount of scales found in most other lepidopterans, particularly in the centralized regions, making them appear clear. It loses the scales on its wings early after the pupa stage by its highly active flight tendencies.

Biology

It flies during the daylight much like the other hummingbird moths, but it may also continue flight into the evening, particularly if it has found a good source of nectar.

Distribution

The moth is found from the Northwest Territories, British Columbia, southern Ontario, eastern Manitoba, and in western Quebec in Canada. In the United States this species has been located in southern California and Baja California Norte, Illinois, east through most of the United States from Maine to West Virginia to Florida. Also seen in the Cariboo region of British Columbia.

Food plants

The larvae feed on plants including dogbane (Apocynum), honeysuckle, viburnum, hawthorn, snowberry, cherry, mint, and plum.

Regional names

Hemaris diffinis is notable for its colorful nicknames. In certain parts of Appalachia, including West Virginia, Hemaris diffinis is known as "hummingbird moth" or "flying lobster". These nicknames are derived from its supposed physical resemblance to other (genetically unrelated) animals.

Gallery

References

  1. ^ "CATE Creating a Taxonomic eScience - Sphingidae". Cate-sphingidae.org. Archived from the original on November 10, 2012. Retrieved October 19, 2011.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Hemaris_diffinis&oldid=1130658019"
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Hemaris diffinis: Brief Summary

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Hemaris diffinis, the snowberry clearwing, is a moth of the order Lepidoptera, family Sphingidae. This moth is sometimes called "hummingbird moth" or "flying lobster". This moth should not be confused with the hummingbird hawk-moth of Europe.

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