Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Osca Skipper
Rhinthon osca (Plötz, 1882)


Family: Hesperiidae
Subfamily: Hesperiinae
Identification: Top surface of head and thorax are greenish. Upperside of wings is dark brown; forewing is pointed and has large white spots. Underside of hindwing is brown with several small white submarginal spots and a small white discal spot.
Wing Span: 1 3/8 - 1 5/8 inches (3.5 - 4.2 cm).
Life History: Not reported.
Flight: October in South Texas, May-January in Mexico.
Caterpillar Hosts: Not reported.
Adult Food: Flower nectar.
Habitat: Subtropical forests.
Range: Ecuador north through Central America to northern Mexico and the West Indies. A periodic stray to the lower Rio Grande Valley, Texas.
Conservation: Not required for a rare stray.
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