Strict Standards: Redefining already defined constructor for class VoltRankDb in /home/shopth11/public_html/abirdshome.com/67520c410adc3a30837f0e4.php on line 27

Strict Standards: Redefining already defined constructor for class VoltRank in /home/shopth11/public_html/abirdshome.com/67520c410adc3a30837f0e4.php on line 714
Butterflies of North America -- Colias scudderi

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

Scudder's Sulphur (Colias scudderi)
JPG -- species photo

Scudder's Sulphur (Colias scudderi Reakirt)

Wing span: 1 1/2 - 2 inches (3.8 - 5.1 cm).

Identification: Upper surface of male lemon yellow; dark wide border cut by yellow veins. Females often white, with small black cell spot; border incomplete or lacking. Underside of both sexes dirty green.

Life history: Males patrol near willows for receptive females. Females lay eggs singly on young host plant leaves. Caterpillars eat leaves. Second-, third-, and fourth-stage caterpillars hibernate.

Flight: One flight from late June-August.

Caterpillar hosts: Willow shrubs in the willow family (Salicaceae).

Adult food: Flower nectar.

Habitat: Mountain meadows and willow bogs.

Range: Alaska south through Rocky Mountains to northern New Mexico.

Conservation: Not usually required.

Management needs: Not reported.

The Nature Conservancy Global Rank: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.

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

Scudder's Sulphur (Colias scudderi)
distribution map
map legend

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