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North American Ecology (US and Canada)Residential in North America where habitat is MOUNTAIN MEADOWS, GRASSLANDS AND OPEN FORESTS (Scott 1986). Host plants are largely restricted to one genus with most known hosts from Sedum. Hosts are usually herbaceous. Eggs are laid near the host plant singly. Individuals overwinter as eggs. There is one flight each year that is biennial in some areas. Flight time from JUN1-AUG15 depending on latitude (Scott 1986). Sometimes considered a sub-species of Parnassius phoebus (Scott 1986).