North American Ecology (US and Canada)
provided by North American Butterfly Knowledge Network
Resident in several disjunct populations throughout North America and migratory in some parts of its range (Scott 1986). Habitats are TRANSITION TO CANADIAN ZONE WASTE PLACES; CANADIAN TO ALPINE ZONE ROCKY PLACES; ALPINE FELL FIELDS IN THE SIERRA; ARCTIC TUNDRA. Hosts plants are usually herbaceous with most known hosts from POLYGONACEAE. Eggs are laid on the host plant singly. Individuals overwinter as half-grown larvae. Subspecies Americana undergoes two flights per year, between June-Sept in northern part of their range and APR-OCT in southern part of range). Other subspecies have one flight with approximate flight times JULY1-July31 in Arctic, JULY1-AUG31 in the southern part of their range (Scott 1986).
