Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Acadian Hairstreak
Satyrium acadica (W.H. Edwards, 1862)

Family: Lycaenidae
Subfamily: Theclinae
Identification: One tail on each hindwing. Upperside brown-gray. Underside of hindwing gray; blue marginal spot is capped with orange; row of orange submarginal spots capped with black; round black spots form postmedian row.
Wing Span: 1 1/8 - 1 1/2 inches (2.9 - 3.8 cm).
Life History: Males perch on low vegetation near host plants to watch for females. Eggs are laid on twigs and hatch the next spring; caterpillars eat leaves.
Flight: One flight from June-August.
Caterpillar Hosts: Various willow species including black willow (Salix nigra) and silk willow (Salix sericea).
Adult Food: Nectar from flowers including butterflyweed, meadowsweet, milkweeds, New Jersey tea, and thistles.
Habitat: Willow-lined streams, marshes, moist woodlands.
Range: British Columbia east to Nova Scotia; south to Idaho, Colorado, the upper Midwest, Maryland, and New Jersey.
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.
Comments: NULL
Alternate Scientific Names:
Satyrium acadicum