North American Butterflies and Moths List

The definitive website on wildbirds & nature

The Registry of Nature Habitats

U.S. Geological Survey

Butterflies of North America

Butterflies of Northern Mexico

'Trebius' Fawn-spotted Skipper (Cymaenes odilia trebius)
JPG -- species photo

"Trebius" Fawn-spotted Skipper (Cymaenes odilia trebius [Mabille])

Wing span: 13/16 - 1 3/16 inches (2.1 - 3.1 cm).

Identification: Wings are dark brown. Upperside of forewing has very small transparent white spots. Underside of hindwing has 2 irregular pale bands, the innermost touching the wing's leading edge.

Life history: During the day, this skipper can be found in the shade; it also flies at dusk.

Flight: June-November in South Texas, April-January in Mexico and Central America.

Caterpillar hosts: Paspalum grass.

Adult food: Flower nectar.

Habitat: Subtropical shady woods.

Range: Argentina north through Central America to northern Mexico. A rare stray to South Texas.

Conservation: Not required for a rare stray.

The Nature Conservancy Global Rank: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management needs: None reported.


Opler, P. A. and V. Malikul. 1992. A field guide to eastern butterflies. Peterson 
     field guide #4. Houghton-Mifflin Co., Boston. 396 pages, 48 color plates.

Scott, J. A. 1986. The butterflies of North America. Stanford University Press, 
     Stanford, Calif. 583 pages, 64 color plates.

Stanford, R. E. and P. A. Opler. 1993. Atlas of western USA butterflies including 
     adjacent parts of Canada and Mexico. Denver and Fort Collins, CO. 

Author: Jane M. Struttmann

State and Regional References:

Opler, Paul A. 1999. Peterson Field Guide to Western Butterflies, revised 
     edition. Houghton Mifflin Co., Boston, Mass.

Stanford, R.E. and P.A. Opler. 1993. Atlas of Western USA Butterflies. 
     Privately published, Denver, Colo.
'Trebius' Fawn-spotted Skipper (Cymaenes odilia trebius)
distribution map
map legend

Return to species list
Return to Butterflies of North America main page