Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Gold-hunter's Hairstreak
Satyrium auretorum (Boisduval, 1852)

Family: Lycaenidae
Subfamily: Theclinae
Identification: Hindwing with 1 short tail. Upperside of male light reddish-brown; female with yellowish tinge. Underside of hindwing with dark crescents near outer margin. Spot near tail is dull orange with a black center.
Wing Span: 1 - 1 1/4 inches (2.5 - 3.2 cm).
Life History: Males perch on top of trees and sometimes patrol for females. Eggs are laid singly on stems and hibernate until spring. Caterpillars feed on tender young leaves.
Flight: One flight from May-July.
Caterpillar Hosts: Several species of oak (Quercus).
Adult Food: Flower nectar including milkweeds.
Habitat: Oak hillsides and chaparral.
Range: California west of the Sierra Nevada, Transverse Range, and deserts, from Mendocino County south to San Diego County and into Baja California Norte.
Conservation: The Santa Monica Mountains Hairstreak (subspecies fumosum) is highly localized and threatened by urbanization in southern California.
Management Needs: Protect habitat of remaining colonies of subspecies fumosum.
Comments: NULL
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