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North American Ecology (US and Canada)

Resident in southwestern United States and migratory north from this range (Scott 1986). A non-contiguous population considered by some (Scott 1986) as subspecies pseudofea is resident in Florida and Louisiana/Alabama, mostly along the coast. Another Antillean-based subspecies isopthalma bridges all populations. Habitats are LOWER-ALTITUDE ALKALINE AREAS INCLUDING SALT MARSH, DESERT, PRAIRIE, WASTELAND. Host plants can be shrubs or herbs and include many species, but mostly in one family (Chenopodiaceae). Eggs are laid on the host plant, singly. Individuals overwinter as pupae. There are multiple flights each year, YEAR-ROUND IN S. CALIF. and TEX. and MAR1-DEC1 IN S. NEV. (Scott 1986). Brephidium pseudofea and B. isopthalma are sometimes considered subspecies of B. exilis (Scott 1986).

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