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Description"Keen's myotis is a medium-sized bat with a long tail. It does not demonstrate narrowly specialized habitat needs. It roosts in caves and trees in the summer, sometimes in small colonies. The bats hunt insects at night and are most active shortly after sunset and shortly before dawn. Larger groups of bats form colonies to hibernate together in the winter, sometimes in the same hibernaculum as other species of bats. As with other bats that hibernate, breeding takes place in the fall, but the fetus does not develop until spring. In the summer, males usually roost separately from females and their young."
Mammal Species of the World
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