Breeds probably in early spring. Parturition dates vary extensively throughout range; in North America, young have been found as early as June and as late as August; probably most births occur in June and July. In Arizona, young a week old or younger have been found from mid-June through early August (Hoffmeister 1986). Litter size: usually 1. Adults males and females cohabitat in the same roosts throughout the year, even during period of parturition and lactation (unusual among bats) (Schmidly 1991).
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