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Butterflies of North America

Butterflies of New York

California Tortoiseshell (Nymphalis californica)
JPG -- species photo


California Tortoiseshell (Nymphalis californica [Boisduval])

Wing span: 1 1/4 - 2 3/4 inches (3.2 - 7 cm).

Identification: Upperside is orange-brown with large black spots and dark wing borders. Underside looks like a dead leaf and is dark mottled brown with darker wing bases; hindwing does not have a centered silver spot.

Life history: Males perch in the late afternoon to look for females. Eggs are laid in bunches on the host plant; caterpillars eat leaves and feed together when young. Adults hibernate.

Flight: One brood: Adults emerge in June and fly until fall, then overwinter. They fly the following spring until April or May, mating and laying eggs for the next brood.

Caterpillar hosts: Various species of wild lilac (Ceanothus).

Adult food: Flower nectar.

Habitat: Chaparral, woodland, brush areas, forest clearings and edges.

Range: British Columbia south along the Pacific Coast to Baja California Norte, east to Montana, Wyoming, Colorado, and New Mexico. Rare migrants to Michigan, Pennsylvania, New York, and Vermont after periodic population explosions in Mexico.

Conservation: Not usually required.

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.

References:


Opler, P. A. and G. O. Krizek. 1984. Butterflies east of the Great Plains. Johns 

     Hopkins University Press, Baltimore. 294 pages, 54 color plates.



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.



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

     Boston, Mass. 370 pages, 23 color plates.

Author: Jane M. Struttmann

State and Regional References:


Cech, R. 1993.  A Distributional Checklist of the Butterflies and Skippers of 

     the New York City Area (50-mile Radius) and Long Island.  New York City 

     Butterfly Club Special Publication.  27 pp.



Forbes, W.T.M.  1960.  Lepidoptera of New York and Neighboring States.  Part 

     IV: Agaristidae through Nymphalidae Including Butterflies.  Cornell Univ. 

     Agricultural Experimental Station, Ithaca, N.Y.  Memoir 371.  188 pp.



Glassberg,  J.  1993.  Butterflies Through Binoculars: A Field Guide to 

     Butterflies in the Boston-New York-Washington Region.  Oxford Univ. Press, 

     New York, N.Y.  160 pp. 



Klass, C. and Dirig, R.  1992.  Learning about Butterflies.  Cornell Cooperative 

     Extension Publication, 4-H Member/Leader Guide 139-M-9.  Ithaca, N.Y.  

     36 pp.



Layberry, R.A., Hall, P.W. & Lafontaine, D.J., 1998.  The Butterflies of 

     Canada.  University of Toronto Press, Toronto, ON.  280 pp.

     

Opler, P.A. 1998. A field guide to eastern butterflies, revised format.

     Houghton Mifflin Co., Boston.      



Shapiro, A.M.  1974.  Butterflies and Skippers of New York State.  Cornell Univ.

     Agricultural Experimental Station, Ithaca, N.Y.  Search 4:1-60.   

California Tortoiseshell (Nymphalis californica)
distribution map
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