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North American Ecology (US and Canada)

provided by North American Butterfly Knowledge Network
Resident in northern North America and intermountain West (Scott 1986). Habitats are WILLOW BOGS. Host plants are usually shrubs with hosts restricted to a few species mostly in one genus (SALIX) of family SALICACEAE. Eggs are laid on the host plant singly. Individuals overwinter as 2nd, 3rd or 4th instar larvae. There is one flight each year with the approximate flight time JUN15-JUL15 (Scott 1986). Sometimes listed as a subspecies of Colias scudderi (Scott 1986).
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Leslie Ries
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Conservation Status

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Not of concern.
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Cyclicity

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One brood annually, with peak flight activity from late June to late July.
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Distribution

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Alaska south to northern Ontario, southern Manitoba, and northwestern Wyoming (Opler 1999).
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General Description

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Most similar to the Pink-edged Sulphur (C. interior), but gigantea is larger (forewing length 26 - 32 mm, compared to 22 - 27 mm), with a larger discal spot and often with a more pronounced satellite spot. The shape of the forewing is also more rounded. Boreal region populations are subspecies mayi, while those from the Crowsnest Pass region southward are slightly smaller and are considered supspecies harroweri (Bird et al. 1995).
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Habitat

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Fens, bogs and wet meadows.
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Life Cycle

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The immature stages are undescribed. It is believed that larvae overwinter (Bird et al. 1995). The wet, shrubby areas inhabited by this species means it is not often observed, but road allowances through fens and bogs with regenerating willows are good places to look for this insect.
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Trophic Strategy

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The larvae feed on willows (Layberry et al. 1998). There are no published reports of adult feeding behaviour.
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Colias gigantea

provided by wikipedia EN

Colias gigantea, the giant sulphur or giant northern sulfur, is a butterfly in the family Pieridae found in North America. Its range includes Alaska across Canada to the east coast and Wyoming, Montana, and Oregon.[1]

Flight period is from June until early August.[1] It inhabits tundra and willow bogs.[2]

Wingspan is from 37 to 55 millimetres (1.5 to 2.2 in).[1]

Larvae feed on Salix spp.[1][3] Adults feed on flower nectar.[2]

Subspecies

Listed alphabetically.[3]

  • C. g. gigantea (Alaska, Alberta, British Columbia, Manitoba, Saskatchewan, Ontario, Yukon, Northwest Territories)
  • C. g. harroweri Klots, 1940 (Wyoming, Montana, Oregon)
  • C. g. mayi F. & R. Chermock, 1940

References

  1. ^ a b c d Giant Sulphur, Butterflies of Canada
  2. ^ a b "Colias gigantea". explorer.natureserve.org. Retrieved 2022-02-12.
  3. ^ a b Colias at Markku Savela's Lepidoptera and Some Other Life Forms

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Colias gigantea: Brief Summary

provided by wikipedia EN

Colias gigantea, the giant sulphur or giant northern sulfur, is a butterfly in the family Pieridae found in North America. Its range includes Alaska across Canada to the east coast and Wyoming, Montana, and Oregon.

Flight period is from June until early August. It inhabits tundra and willow bogs.

Wingspan is from 37 to 55 millimetres (1.5 to 2.2 in).

Larvae feed on Salix spp. Adults feed on flower nectar.

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