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.Mead's Sulphur, Butterflies of Canada
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.Colias at Markku Savela's Lepidoptera and Some Other Life Forms Adults feed on flower nectar from alpine sunflower and asters.
Subspecies Listed alphabetically: 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)
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