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Mead's Sulphur

Colias meadii Edwards 1871

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North American Ecology (US and Canada)

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Resident in the mountain west in North America (Scott 1986). Habitats are ALPINE TUNDRA AND SUBALPINE MEADOWS. Host plants are usually herbaceous with hosts largely restricted to a few species in one family, LEGUMINOSAE. Eggs are laid on the host plant singly. There is one flight each year with the approximate flight time JUL1-AUG30 (Scott 1986).
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Conservation Status

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Not of concern.
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Cyclicity

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One brood, the flight peaking between early July to early August.
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Distribution

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There are several discontinuous populations of Mead's Sulphur from Tumbler Ridge, BC south to Colorado and extreme northern New Mexico (Layberry et al. 1998, Opler 1999). It occurs primarily in the front ranges of the Rockies.
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General Description

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The only other Alberta Colias with a dorsal orange colour that extends all the way to the forewing base is the Canada Sulphur (C. canadensis). The Canada Sulphur, however, has the pink outline of the underside discal spot smeared outwards, and is a brighter orange (not burnt-orange). Our populations are subspecies elis.
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Habitat

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Lush subalpine and alpine meadows.
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Life Cycle

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A description of the immature stages is summarized by Guppy & Shepard (2001). The yellow-green eggs are conical in shape. The mature larvae are dark yellowish-green and covered in short black hairs, with a yellow subdorsal and white lateral line. The pupae are yellow green with a dark dorsal line. It is possible that this species overwinters twice before reaching maturity.
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Trophic Strategy

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The larval host plants are not known in Canada. in Wyoming and Colorado, subspecies meadii feeds on legumes such as Astragalus and Trifolium (Guppy & Shepard 2001). There are no published reports of adult nectar sources.
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Colias meadii

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Colias meadii, the Mead's sulphur, is a butterfly in the family Pieridae found in North America. Its range includes the Rocky Mountains in Canada and the United States.[1][2]

Flight period is from July to August.[1] It inhabits arctic-alpine tundra and rocky slopes, in high mountain areas at or near tree lines.[3]

Wingspan is from 35 to 44 mm.[1]

Larvae feed on Trifolium spp. Astragalus alpinus, Oxytropis deflexa and Vicia americana.[1][2] Adults feed on flower nectar from alpine sunflower and asters.[3]

Subspecies

Listed alphabetically:[2]

  • C. m. elis Strecker, 1885 (Alberta, British Columbia)
  • C. m. lemhiensis Curtis & Ferris, 1985 (Idaho, Montana)
  • C. m. meadii (Colorado, Utah, New Mexico, Wyoming, Montana)

References

  1. ^ a b c d Mead's Sulphur, Butterflies of Canada
  2. ^ a b c Colias at Markku Savela's Lepidoptera and Some Other Life Forms
  3. ^ a b "Colias meadii". explorer.natureserve.org. Retrieved 2022-02-12.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Colias_meadii&oldid=1071314818"
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Colias meadii: Brief Summary

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Colias meadii, the Mead's sulphur, is a butterfly in the family Pieridae found in North America. Its range includes the Rocky Mountains in Canada and the United States.

Flight period is from July to August. It inhabits arctic-alpine tundra and rocky slopes, in high mountain areas at or near tree lines.

Wingspan is from 35 to 44 mm.

Larvae feed on Trifolium spp. Astragalus alpinus, Oxytropis deflexa and Vicia americana. Adults feed on flower nectar from alpine sunflower and asters.

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