North American Butterflies and Moths List

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Butterflies of North America

California Dogface (Zerene eurydice)
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California Dogface (Colias eurydice [Boisduval])

Wing span: 2 - 2 1/2 inches (5.1 - 6.3 cm).

Identification: Black outer half of male forewing encloses yellow-orange "dog's head" tinged with light purple iridescence. Black "eye" very near or touching the border. Hindwing yellow-orange, sometimes with black border. Female all yellow with a black upper forewing cell spot; sometimes with scattered black scaling on outer half.

Life history: Males patrol for females.

Flight: Two flights from April-May and July-August.

Caterpillar hosts: Usually false indigo (Amorpha californica) in the pea family (Fabaceae).

Adult food: Flower nectar.

Habitat: Foothills, chaparral, oak or coniferous woodlands.

Range: North-central California south to Baja California, west of the central mountains and deserts.

Conservation: None usually required.

Management needs: Not reported.

The Nature Conservancy Global Rank: G3 - Very rare or local throughout its range or found locally in a restricted range (21 to 100 occurrences). (Threatened throughout its range).

References:


Scott, J. A. 1986. The butterflies of North America. Stanford  University 

     Press, Stanford, Calif. 583 pages, 64 color plates.



Tilden, J. W. 1986. A field guide to western butterflies.  Houghton-Mifflin 

     Co., Boston, Mass. 370 pages, 23 color plates.

Author: Jane M. Struttmann

California Dogface (Zerene eurydice)
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