Our summer fundraiser has arrived, and we need your help!
We depend on donations to keep Butterflies and Moths of North America freely available. If everyone who uses this resource makes a donation, we could cover our ongoing costs, develop new features, upgrade the system, and maybe even remove those pesky ads. Please make a one-time or recurring donation to show your support for this valuable source of information. Thank you!
Identification: Extremely ragged wing edges. Geographically variable. Upperside is reddish brown with wide dark borders; hindwing border contains yellow spots. Underside is brown, outer half lighter; submarginal spots are greenish; hindwing with L- or C-shaped silver spot in center.
Wing Span: 1 3/4 - 2 1/2 inches (4.5 - 6.4 cm).
Life History: In late afternoon, males perch on rocks or plants in gullies to wait for females. Eggs are laid singly on upper surface of host leaves, which caterpillars eat. Caterpillars are solitary and rest on the underside of leaves. Adults hibernate and mate the following spring.
Flight: One brood from May-August.
Caterpillar Hosts: Small pussy willow (Salix humilis), black birch (Betula lenta), alder (Alnus), western azalea (Rhododendron occidentale), and gooseberry (Ribes).
Adult Food: Flower nectar, dung, carrion.
Habitat: Forests, mountain streamsides, canyons.
Range: Boreal North America south of the tundra. Central Alaska south to central California and northern New Mexico; east across southern Canada and the Great Lakes region to New England and the Maritimes. A separate population occurs in the southern Appalachians.
Conservation: Not usually required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
We want to express our gratitude to all who showed their support by making a contribution this year. You can donate to support this project at any time.