Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Golden Hairstreak
Habrodais grunus (Boisduval, 1852)

Family: Lycaenidae
Subfamily: Theclinae
Identification: Short tail on hindwing. Upperside of male dark brown with yellow tinge in cell area of forewing; female not as dark. Underside yellow brown with a narrow, dark postmarginal line; hindwing has thin gold crescents at margin, of which the last two are iridescent.
Wing Span: 1 - 1 1/4 inches (2.5 - 3.2 cm).
Life History: Males patrol tree canopy for receptive females. Eggs are laid on twigs of host trees. After hibernating through the winter, eggs hatch and the caterpillars feed on young leaves.
Flight: One flight from June-September.
Caterpillar Hosts: Leaves of oak relatives including canyon live oak (Quercus chrysolepis), huckleberry oak (Q. vaccinifolia), and tan oak (Lithocarpus densiflorus).
Adult Food: Adults do not seek flower nectar but search out moisture sources and possibly aphid honeydew or other exudates.
Habitat: Oak woodland, canyons, mountain ridges.
Range: Southern Arizona, Oregon, and California.
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
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