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Species Detail
Mountain Fritillary
Boloria alaskensis (Holland, 1900)
Attributes of Boloria alaskensisFamily: Brush-footed Butterflies (Nymphalidae) Subfamily: Longwings (Heliconiinae) Identification: Outer margin of hindwing arched. Upperside of male orange with dark wing bases and delicate markings; female cream with heavy dark pattern. Underside of hindwing tan with faint markings. Life history: Males patrol close to the ground during the day. Females lay eggs singly near host plants. Two years are needed to complete development from egg to adult; caterpillars hibernate their first and second winters. Flight: One brood from late June-early August. Wing span: 1 3/8 - 1 7/8 inches (3.5 - 4.8 cm). Caterpillar hosts: False bistort (Polygonum bistortoides) and alpine smartweed (P. viviparum). Adult food: Flower nectar. Habitat: Moist tundra and high mountain meadows. Range: Holarctic. Alaska and Northwest Territory, western Yukon, northwestern British Columbia. Isolated populations in Canadian Rockies and Wind River Mountains of Wyoming. Conservation: Not usually of concern but subspecies halli in the Wind River Mountains of Wyoming should be periodically monitored. NatureServe Global Status: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery. Management needs: None reported. | Documented Records for Boloria alaskensis
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