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North American Ecology (US and Canada)Resident in southern North America with an extensive migratory range to the north (Scott 1986). Habitats are OPEN AREAS. Host plants are usually herbaceous with most hosts largely restricted to a few species in one family, LEGUMINOSAE. Eggs are laid on the host plant singly. There are multiple flights each year with flights year-round in the southern part of their range (Scott 1986). Sometimes considered synonymous with Colias cesonia (Scott 1986).