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North American Ecology (US and Canada)Boloria frigga is a resident of Canada and Alaska, with two separate populations in Wyoming and Colorado North America (Scott 1986). Habitats are shrub-willow (half a meter tall) bogs and arctic tundra. Host plants are mostly shrubs from genus Salix (Salicaceae), and also include species from families Betulaceae and Rosaceae. Individuals overwinter as nearly mature larvae. There is one flight each year with the approximate flight time June 1-July 31 (July 1- early Aug. in Labrador) (Scott 1986).