Tri-colored Bat (Perimoytis subflavus)
These bats were formerly known as the eastern pipistrelle bat and they are the only species within their given genus. They are found living in the eastern half of the United States, as far north as the southern edge of eastern Canada, and along the Gulf Coast of Mexico into northern Honduras. They reside in open woodland areas near water sources and are not usually seen over open fields or in deep, forested areas.
Color and Size
Tri-colored bats are usually 4 to 5 inches in length (including body and tail) and have a wingspan of 8.5 to almost 10 inches. Males and females are sexually dimorphic, meaning that the females are larger than the males. The females can range in weight from 5.8 grams to 7.9 grams depending on the time of year and the males range from 4.6 to 7.5 grams. Their name comes from the three different colors of the individual hairs on their bodies where the base and tip are dark, and the middle is a yellowish-brown color. Their overall color is a yellowish-brown.
Diet and Behavior
The tri-colored bat is considered to be a generalist insectivore and will prey on all sorts of different flying insects. They roost within the foliage of trees during the spring and summer time because they will blend into these roosting areas due to their coloration. They are a hibernating species and will enter hibernation between August and October (depending on the area in which they live).
They hibernate in caves, mines, and deep rock crevices, solitarily or of only a couple of individuals together. Mating occurs before they go into hibernation (outside the hibernation site) and this is the only time that the sexes gather together. The females will store the sperm until the springtime when they emerge and will form small maternity colonies of about 15 individuals.