Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Muted Hairstreak
Electrostrymon joya (Druce, 1907)


Family: Lycaenidae
Subfamily: Theclinae
Identification: Two tails on the hindwing. Upperside of male orange-brown; underside tan with red postmedian line. Female not distinguishable in field from that of Ruddy Hairstreak.
Wing Span: 15/16 - 1 3/16 inches (2.4 - 3.0 cm).
Life History: Males perch on hilltop shrubs to seek receptive females.
Flight: April to January in tropical America (3 more flights).
Caterpillar Hosts: In Venezuela, flowers of mango (Mangifera indica) and Psiguria racemosa.
Adult Food: Flower nectar.
Habitat: Openings and edges in tropical semideciduous river forests, second growth.
Range: South Texas south through mainland tropical America to Peru.
Conservation: Any permanent U.S. populations should be protected.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Locate populations and protect their habitat.
Comments: NULL