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North American Ecology (US and Canada)Boloria astarte is a year-round resident in British Columbia, Alberta and Alaska (Scott 1986). Habitats are alpine/arctic rocky ridges. Host plants are limited to the herbaceous species Saxifraga bronchialis (Saxifragaceae). Eggs are laid on or near the host plant. There are variable numbers of flights, in Alta there is one flight each year with approximate time July1-Aug15; in the arctic, Washington, and the Arctic flights are biennial (every other year), in the arctic they occur late June-July 31 (Scott 1986).