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North American Ecology (US and Canada)Limenitis weidemeyerii is resident in the western United States east of the Rocky Mountains (Scott 1986). Habitats are upper Sonoran to Canadian zone wooded mountain canyons, streamsides and suburbs. Host plants can be shrubs or trees of many species from families Salicaceae and Rosaceae. Eggs are laid on the host plant singly. Individuals overwinter as third instar larvae in a hibernaculum. There is one flight, mainly June 1-July 30 in the northern part of the range and two flights between June1-Aug. 31 in the southern part of their range and at lower altitudes (Scott 1986).