This Swallowtail ranges from Alaska and the Yukon Territory south through British Columbia and east across Canada to the east coast. It extends into the extreme northern U.S. from northeastern Washington to central Michigan, and from northern New York into New England. It occurs in the panhandle of Idaho.
It can be found in and along deciduous and mixed forests.
Caterpillars feed on the leaves of several species of trees: birches (Betula
spp.), aspen (Populus spp.), crabapple (Malus spp.), and black
cherry (Prunus serotina.).
Adult: Butterflies drink flower nectar.
Caterpillars construct small feeding structures from folded leaves tied and lined with silk. There is only one generation of caterpillars each year. Pupae overwinter in a physiological state called diapause, with the adults generally emerging to fly from May to mid-August. Males may often be observed puddling. This species may hybridize with Papilio rutulus, the Western Tiger Swallowtail, but such pairings are rare.
Males actively patrol in search of receptive females. Females lay eggs singly on the leaves of host plants.
|Idaho Status:||Unprotected nongame species.|
G5; populations are widespread, abundant, and secure.
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. http://www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/bflyusa.htm (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.