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North American Ecology (US and Canada)Apodemia nais is a year-round resident in the southwestern United States and in southwestern Texas (Big Bend) (Scott 1986). Habitats are chaparral and open woodland. Host plants are shrubs, restricted mainly from two species, Caenothus fendleri (Rhamnaceae) and Prunus havardii (Rosaceae). Eggs are laid on the host plant singly. Larvae live in nests of silked leaves. Individuals overwinter as half-grown to nearly mature larvae. There is one flight each year with the approximate flight time late June-July 31, in w. Texas there is one flight May1-31, and a partial second flight Aug1-30 (Scott 1986).