North American Ecology (US and Canada)
provided by North American Butterfly Knowledge Network
Boloria polaris is resident in Alaska and arctic Canada, and also ranges to Scandinavia and Asia (Scott 1986). Habitat is arctic tundra. Host plants are restricted to a small number of species from herbaceous genus Dryas (Rosaceae), and probably also Vaccinium uliginosum (Ericaecae). Eggs are laid on the host plant singly or in clusters of 2-20 eggs per clutch. Individuals overwinter as larvae. There is one flight each year with the approximate flight time mostly late June-July31 (July15-Aug15 in Labrador), species is biennial and flies in even year in most places, odd years in c. Alaska, Churchill, Manitoba, and Baker Lake, NW Territiories (Scott 1986).
