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North American Ecology (US and Canada)Resident in northern North America (Scott 1986). Habitats are LUSH ARCTIC/ALPINE ZONE TUNDRA AND HUDSONIAN TAIGA. Host plants are usually herbaceous with most known hosts a few species from LEGUMINOSAE. There is one flight each year with the approximate flight time JUNE1-JUL15 (Scott 1986). Sometimes listed as a sub-species of Colias hecla.