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Gulf Fritillary (Agraulis vanillae [Linnaeus])
Wing span: 2 1/2 - 3 3/4 inches (6.3 - 9.5 cm).
Identification: Upperside bright orange with black markings; 3 black-encircled white dots on forewing leading edge. Underside brown; forewing with orange at base; both wings with elongated, iridescent silver spots.
Life history: Males patrol for females, who lay eggs on many parts of the host plant. Caterpillars feed on most parts of the host. Adults overwinter in the south.
Flight: Throughout the year in south Florida and South Texas, January-November in the north. Number of broods has not been determined.
Caterpillar hosts: Various species of passion-vine including maypops (Passiflora incarnata) and running pop (P. foetida).
Adult food: Nectar from lantana, shepherd's needle, cordias, composites, and others.
Habitat: Pastures, open fields, second-growth subtropical forest and edges, city gardens.
Range: South America north through Central America, Mexico, and the West Indies to the southern United States. Wanders north to the central United States; rare northward.
Conservation: Not usually of concern.
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: Cultivate host plants.
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.
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.
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