North American Ecology (US and Canada)

Euphyes dukesi is a year-round resident in the eastern United States, in three separate populations (Scott 1986). Habitats are Gulf Coast to transition zone marshy areas and wooded swamps that have poor drainage and many sedge swamps: mainly along the eastern coast, in the Mississippi River system and around the Great Lakes. Host plants are sedges restricted to genus Carex (Cyperaceae). Eggs are laid on the host plant singly. Individuals overwinter as fourth instar larvae. There are variable numbers of flights each year depending on latitude with one flight in the northern part of the range occurring between July 1-July 31, and about three flights in the southern part of the range occurring between May 15- Oct. 31 (Scott 1986).