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North American Ecology (US and Canada)Calephelis mutica is a year-round resident in the mid-western United States (Scott 1986). Habitats are swamps, bogs, and wet meadows. Host plants are herbaceous and restricted to a few species of one genus, Cirsium (Compositae). Eggs are laid on the host plant singly. Individuals overwinter as fourth or fifth stage larvae. There is mostly one flight each year in the northern part of the range, with approximate flight time July15-Aug30; in Mo. and Ark., there are two flights, June1-30 and Aug.1-Sept.30 (Scott 1986).