Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Ilavia Hairstreak
Satyrium ilavia (Beutenmüller, 1899)

Family: Lycaenidae
Subfamily: Theclinae
Identification: Two tails on each hindwing. Underside of hindwing pale brown-tan; blue tail-spot capped narrowly with orange usually reduced or absent; white-edged black W near inner margin faint or absent.
Wing Span: 7/8 - 1 1/16 inches (2.2 - 2.8 cm).
Life History: Eggs are laid singly on host plant twigs and hatch the following spring. Caterpillars feed on leaves, buds, and male catkins
Flight: One flight from March-June.
Caterpillar Hosts: Scrub oak..
Adult Food: Flower nectar.
Habitat: Oak brush sometimes mixed with junipers, cactus, and other plants.
Range: Central and southeastern Arizona.
Conservation: Not usually required.
NCGR: G4, 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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