North American Butterflies and Moths List

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Butterflies of North America

Crimson Patch (Chlosyne janais)
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Crimson Patch (Chlosyne janais [Drury])

Wing span: 1 7/8 - 2 5/8 inches (4.8 - 6.7 cm).

Identification: Upper and lower sides of forewing are black with small white spots. Upper hindwing is black with large orange-red patch on the basal half. Lower side of hindwing has an orange-red postmedian band that does not extend to margins of the wing.

Life history: Eggs are laid in groups under host plant leaves. Caterpillars feed on the undersides of leaves; younger caterpillars feed gregariously.

Flight: Several broods in South Texas from July-November, all year in the tropics.

Caterpillar hosts: Scrubby plants in the acanthus family (Acanthaceae) including Anisacanthus wrightii in Texas.

Adult food: Flower nectar.

Habitat: Lowland tropical forest edges and fields.

Range: Colombia north through Central America and Mexico to South Texas. Strays to north Texas and southeastern New Mexico.

Conservation: Not necessary for sporadic resident.

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: Provide host plant patches in refuges and parks along the lower Rio Grande Valley, Texas.


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

Crimson Patch (Chlosyne janais)
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