Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Bog Fritillary
Boloria eunomia (Esper, 1800)

Family: Nymphalidae
Subfamily: Heliconiinae
Identification: Upperside orange-brown to tan with dark markings. Underside of hindwing orange with light nonmetallic bands; postmedian row spots are white bordered with black.
Wing Span: 1 1/4 - 1 3/4 inches (3.2 - 4.5 cm).
Life History: Males patrol in wet areas for females. Eggs are laid in groups of 2-4 under host plant leaves, which the caterpillars eat. Third- and fourth-stage caterpillars overwinter.
Flight: One brood from June-August.
Caterpillar Hosts: Willow (Salix), alpine smartweed (Polygonum viviparum), and violets (Viola).
Adult Food: Nectar from flowers including Labrador tea and goldenrod.
Habitat: Bogs, moist tundra, willow seeps.
Range: Alaska and most of Canada south to the bordering United States including northern Maine and the northern Great Lakes region; south in the Rocky Mountains to Colorado.
Conservation: Not usually of conservation concern.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Alternate Scientific Names:
Proclossiana eunomia
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