Northwestern Fritillary

Speyeria hesperis

Appearance: Quite variable. Upperside of both wings are orange-brown, often darker at base and swollen black veins especially on forewing; male has black scales on veins. Underside of hindwing with basal disk of light brown or orange-brown with pale submarginal band; spots silvered or unsilvered. Marginal and submarginal black spots are small. Eyes blue-gray.

Size: Medium; 1 1/2 to 2 1/2 inches

Habitat: Moist meadows in coniferous forests and wooded stream sides

Season: Late June to early September

Larval Foodplant: Violets

Did You Know…
Males patrol during the day in open areas. Eggs are laid singly on leaf litter near host plant. Unfed first-stage caterpillars overwinter, emerging in spring to feed on leaves. Eye color can be used to distinguish this species from the similar Aphrodite Fritillary which has yellow-green eyes.

Species Gallery (click to enlarge)