Originally known as the eastern pipestrelle, this bat was reclassified and now is the only member of the genus Perimyotis.

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The tri-colored bat is found in the eastern regions of the United States, Mexico, and Central American, and can be found as far north as Canada's southern edge and as far south as the north of Honduras. This bat is one of the smallest species found in North America, with a total length of 77-89 mm and a wingspan of 220-250 mm. The average weight of bats belonging to this species (46 grams) is just about the weight of a quarter. 

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Tri-colored bats have the longest hibernation period among North American bats (late July to early April) and require the warmest parts of caves or mines. They tend to hibernate individually or in small groups of 2-3 individuals. Outside of the hibernation period, this species inhabits forest edges near water and roosts in tree foliage, rock crevices, buildings, or caves. 

 

The tri-colored bat is a generalist insectivore, though it shows a preference for beetles and moths. Echolocation guides these bats' hunting efforts. 

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Considered to be the bat species most impacted by white-nose syndrome and also experiencing threats due to habitat loss, the tri-colored bat is listed as Endangered and a Species of Greatest Conservation Need in Connecticut's Wildlife Action Plan. It is currently being considered for listing under the Endangered Species Act.