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 Oregon -- Boloria epithore

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 Oregon

Pacific Fritillary (Boloria epithore)
JPG -- species photo

Pacific Fritillary (Boloria epithore [W. H. Edwards])

Wing span: 1 3/8 - 1 3/4 inches (3.5 - 4.5 cm).

Identification: Tip of forewing rounded. Upperside bright orange; black markings large on basal half of wing, small on outer half. Underside orange with purple-brown markings; hindwing with postmedian row of dark circles.

Life history: Males patrol for females all day in woods and meadows. Overwintering is by fourth-stage caterpillars.

Flight: One flight from May-August.

Caterpillar hosts: Violets including Viola ocellata, V. sempervirens, and V. glabella.

Adult food: Flower nectar.

Habitat: Openings in moist forests, wet meadows, streamsides.

Range: Central British Columbia east and south to Alberta and Montana, south along Pacific Coast to central California.

Conservation: Populations in California's Santa Cruz Mountains are limited and may be in jeopardy.

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: Inventory and monitor limited populations and propose any necessary conservation actions.

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

State and Regional References:

Dornfeld, E. J. 1980. The Butterflies of Oregon. Forest Grove, 	Ore., Timber 
     Press.

Hinchliff, J. 1994. An atlas of Oregon Butterflies. Oregon State University
     Bookstore, Corvallis.

Hinchliff, J. 1994. The distribution of the butterflies of Oregon. Evergreen 
     Aurelians. Oregon State University Bookstore, Corvallis, 176 pp. + map. 

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. 

Tilden, J.W. and A.C. Smith. 1986. A Field Guide to Western Butterflies. 
     Houghton Mifflin Co., Boston, Mass.
Pacific Fritillary (Boloria epithore)
distribution map
map legend

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