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North American Ecology (US and Canada)Erebia epipsodea is resident of Western Canada north to Alaska and south into the northwestern and central United States as far south as Colorado and northern New Mexico (Scott 1986). Habitats are moist open grassy areas and meadows. Host plants are unknown, but larvae eat grass (family Gramineae) and sedge (Cyperaceae) in the lab. Eggs are laid on grasses and dead leaves. Individuals overwinter as third and fourth instar larvae. There is one flight each year with approximate flight times mostly June 1-June30 at low altitude, July 15-early Aug. above timberline, and late June-July 31 in Alaska (Scott 1986).