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North American Ecology (US and Canada)Resident in northwestern North America (Scott 1986). Habitats are FOOTHILLS AND MOUNTAINS. Host plants include species from many families, with most hosts from Rosaceae. Hosts are usually trees or shrubs. Eggs are laid on the host plant singly. Individuals overwinter as pupae. There are a variable number of flights based on latitude with the approximate flight time JUN1-JUN30 in the northern part of the range and MAR15-AUG30 in the southern part of their range (Scott 1986).