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North American Ecology (US and Canada)

Phyciodes tharos is resident in the eastern and southern United States, as far north as Alberta and south to southern Mexico and Bimini (Scott 1986). Habitats are moist meadows, moist fields, moist prairie and streamsides. Host plants are herbaceous and largely restricted to one genus, Aster (Compositae). Eggs are laid on the host plant in clusters with between 20-300 (average 63) eggs per clutch. Individuals overwinter as X. There is a variable number of flights each year depending on latitude with multiple flights all year in the south, and two flights in the far northern part of the range with approximate flight times late May-Aug30 (Scott 1986).


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