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North American Ecology (US and Canada)Oarisma garita is a year-round resident in the central-western Canada from Alberta to Manitoba, the United States south to Arizona, and ranges to southern Mexico (Scott 1986). Habitats are grassy places, prairie, and open woodland. Host plants are grasses of multiple species. Eggs are laid on the host plant singly. Individuals overwinter as fourth instar larvae. There is one flight each year with the approximate flight time mostly June 15-July 31, June 1-July 15 in low altitude in Colorado (Scott 1986).