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Boisduval's Yellow (Eurema boisduvaliana [Felder & Felder])
Wing span: 1 1/2 - 2 inches (3.8 - 5.1 cm).
Identification: Upperside lemon yellow with black borders; each hindwing slightly pointed. Male forewing with weak "dog's head" pattern; hindwing with wide black border projecting into yellow ground. Female forewing with black at apex; hindwing with narrow black edge.
Life history: Males patrol flats and gullies for females.
Flight: April-November in south Texas and northward, throughout the year in tropics.
Caterpillar hosts: Cassias (Cassia species) in the pea family (Fabaceae).
Adult food: Flower nectar.
Habitat: Subtropical forests and forest edges, scrub, roadsides, pastures.
Range: Costa Rica north to Mexico. Rare in south Florida (recorded only twice in the Keys); regular migrant to southeast Arizona, southwest New Mexico, and South Texas.
Conservation: Not usually required.
Management needs: None reported.
The Nature Conservancy Global Rank: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
References:
DeVries, P. J. 1987. The butterflies of Costa Rica and their natural
history. Princeton University Press, Princeton, New Jersey. 327
pages, 50 color plates.
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.
Author: Jane M. Struttmann
State and Regional References:
Brown, J.W., Real, H.G., and D.K. Faulkner. 1992. Butterflies of Baja
California. Lepidoptera Research Foundation, Beverly Hills, Calif.
Comstock, J.A. 1927. Butterflies of California. Privately published, Los
Angeles, Calif. [Facsimile available from Entomological Reprint
Specialists, Los Angeles, Calif.]
Dameron, W. 1997. Searching for butterflies in southern California.
Flutterby Press, Los Angeles, Calif.
Emmel, T.C. Editor. 1998. Systematics of western North American butterflies.
Mariposa Press, Gainesville, Florida.
Emmel, T. C. and J. F. Emmel. 1973. The Butterflies of Southern California.
Natural History Museum of Los Angeles County Science Series No. 26.
Garth, J.S. and J.W. Tilden. 1986. California Butterflies. California Natural
History Guide 51. University of California Press, Berkeley and Los
Angeles.
Langston, R.L. 1981. The Rhopalocera of Santa Cruz Island, California. Journal
of Research on the Lepidoptera 18: 24-35.
Miller, Scott E. 1985. Butterflies of the Califorenia Channel Islands. Journal
of the Research on the Lepidoptera 23: 282-296.
Opler, Paul A. 1999. Peterson Field Guide to Western Butterflies, revised
edition. Houghton Mifflin Co., Boston, Mass.
Orsak, L.J. 1977. The Butterflies of Orange County, California. Museum of
Systematic Biology, University of california, Irvine.
Stanford, R.E. and P.A. Opler. 1993. Atlas of Western USA Butterflies.
Privately published, Denver, Colo.
Steiner, J. 1990. Bay Area Butterflies: The Distribution and Natural History
of San Francisco Region Rhopalocera. Hayward, Calif.: Hayward State
University, Masters Thesis.
Tilden, J.W. and A.C. Smith. 1986. A Field Guide to Western Butterflies.
Houghton Mifflin Co., Boston, Mass.
Tilden, J.W. 1965. Butterflies of the San Francisco Bay Region. California
Natural History Guide 12. University of California Press, Berkeley and
Los Angeles.
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