North American Ecology (US and Canada)
Satyrium saepium is resident of the western United states, into southern British Columbia (Scott 1986). Habitats are chaparral and pine woodland. Host plants are shrubs largely restricted to one genus, Caenothus (Rhamnaceae). Eggs are laid on the host plant singly. Individuals overwinter as eggs. There is one flight each year with the approximate flight time depending on location: July15-Aug in Colorado, late May-early Sep from Washington to n. Calif., late May-July31 in s. Calif. (Scott 1986).
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