Chlosyne palla
Northern Checkerspot

Note: This species is referred to by the genus name Charidryas by some authors.

Alternate Common Names:Creamy Checkerspot, Pale Checkerspot.



Range: A western species, it ranges from southern British Columbia and Alberta south through most of California and south to northern Utah and western Colorado. It occurs throughout most of Idaho.

This species tends to occur in open areas such as sagebrush steppe, chaparral, meadows, and open woodlands.


Young caterpillars feed in groups, often in a small silk nest. There is one generation of caterpillars each summer. They overwinter in a physiological state called diapause, then emerge in spring to continue feeding and molting until they are ready to pupate. Adults generally fly from mid-March to August in most of its range but may fly later at high elevations.

Males perch to wait for receptive females, or may actively patrol for them. Females lay clusters of eggs on the bottomsides of the leaves of host plants.

Idaho Status: Unprotected nongame species.
Global Rank:

G4; population levels are secure, but may be of concern in the future.


Ferris, C. D. and F. M. Brown. (eds.) 1981. Butterflies of the Rocky Mountain States. Univ. of Oklahoma Press, Norman, Oklahoma, USA, 442 pp.

Opler, P. A., H. Pavulaan, and R. E. Stanford. 1995. Butterflies of North America. Jamestown, North Dakota, USA: Northern Prairie Wildlife Research Center Home Page. (Version 05Nov98).

Opler, P. A. and A. B.Wright. 1999. A Field Guide to the Western Butterflies.   Second Edition.  Peterson Field Guide Series. Houghton Mifflin Company, New York, New York, USA, 540 pp.

Pyle, R. M. 1981. National Audubon Society Field Guide to North American Butterflies. Alfred A. Knopf, Inc., New York, New York, USA, 924 pp.

Scott, J. A. 1986. The Butterflies of North America. Stanford University Press, Stanford, California, USA, 583 pp.

Stanford, R. E. and P. A. Opler. 1993. Atlas of Western U.S.A. Butterflies (Including Adjacent Parts of Canada and Mexico). Published by authors, Denver, Colorado, USA, 275 pp.