Ornythion Swallowtail (Papilio ornythion Boisduval)
Wing span: 3 1/4 - 4 1/2 inches (8.3 - 11.5 cm).
Identification: Upper forewing spots are yellow-white; marginal row of spots is close to outer edge of wing. Tails are wide and all black. Female has 2 forms: one resembles the male and one is mostly black with a marginal row of large gray-green spots on upperside of hindwing.
Life history: Not reported.
Flight: Probably 2 from April-September.
Caterpillar hosts: Leaves of citrus trees (Rutaceae family).
Adult food: Flower nectar.
Habitat: Citrus groves and gardens.
Range: Mexico and Guatemala. Occasional in central and south Texas and New Mexico; rare in southern Arizona and Kansas.
Conservation: Not noted.
Management needs: None required for occasional colonist from tropics.
The Nature Conservancy Global Rank: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
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