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North American Ecology (US and Canada)Dryas iulia is mostly migratory into North America, rarely as far north as Neb. It is resident in the southern tip of Tex. and Fla. and ranges down to Paraguay and into the Antilles and Bahamas (Scott 1986). Habitats are subtropical open sunny forest clearings. Host plants are usually vines in North America restricted to Passiflora lutea glabrifora (Passifloraceae), but uses other Passiflora species in Latin America. Eggs are laid on the host plant singly. There are multiple flights all year in s. Tex. and s. Fla. (Scott 1986).