Big Brown Bat

Scientific Name: 
Eptesicus fuscus (ep-TES-kus FUS-cus)
Bat Habitat Range
From southern Canada to northern South America and West Indies
Found in a wide range of habitats from farmlands & forests to city neighbor-hoods & parks. Typical summer roosts are trees, snags or man-made structures.
Weight: 14–21g; Wingspan: 13-16 in. Females are slightly larger than males.
Approximately 19 years, with males usually living longer than females.
Beetles make up most of their diet, but also feed on corn rootworm a serious agricultural pest.
In early May through early June big brown bats give birth to one pup in the western part of their range, and to twin pups in the eastern part of their range. After a gestation of 60 days, pups are born naked with eyes closed; eyes open in about 7 days and they will nurse for 32-40 days. Young start to fly in July and August and reach adult size by early September.
Highly social, roosting bats hang in tightly packed groups; maternity colonies can contain 5-500 individuals. These bats typical fly between 20-30 feet from the ground and are very fast flyers, having been recorded at speeds of 40 mph. The big brown bat hibernates in winter, and will loose 25% of their body weight through the course of hibernation.
Conservation Status: 
The big brown bat is a common bat throughout its range.
At OBC: 
OBC animals are rescues from a large group of youngsters found rejected by their mothers (the reason was unknown). Our animals survived as a result of the diligent care of OBC staff and volunteers.

Printable Information: 
© 2012 Organization for Bat Conservation