Mammal. Has wings and often nests in attics in our area. In our area, the common types inside are the little brown bat and the big brown bat. Bats droppings can attract other pests, and bats can have bat bugs, which, like bedbugs, will bite people if no bats are available. Need professional treatment.
Big Brown Bat
As the name suggests, this is a large brown bat with naked, dark membranes. The tail is enclosed in interfemoral membrane. It has short ears, a keeled calcar, and a forearm length of 39-54mm. They use hollow trees, but are equally common in buildings, including barns and churches. Although hibernacula in caves are common, this species also sometimes hibernates in cold buildings.
Little Brown Bat
The little brown bat is a small mammal with a body length of 2 1/2 – 4″ and weighing approximately 1/8 to 1/2 an ounce. The wingspan of little brown bats ranges from 9 – 11″. Bats are the only mammals that engage in truly active flight. As their name suggests they are glossy brown above with a lighter gray color below. These bats can live 20 to 30 years.