Big Brown Bat Eptesicus fuscus (Palisot de Beauvois, 1796)  Synonyms: EPTFUS.

Status:

According to Maryland DNR, summer roosts include buildings, under bridges, hollow trees, beneath loose bark, behind shutters. Winter roosts include buildings, caves, and mines.

Description:

Calls are very similar to Silver-haired Bat and should be reviewed by an expert to verify identification. That said, Silver-haired Bat is not typically found in Maryland in summer.

Relationships:

Has been documented hosting Eastern Bat Bug in Maryland.

There are 210 records in the project database.

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A Big Brown Bat in Garrett Co., Maryland (7/4/2018). Photo by Boyer and McDowell. (MBP list)

A Big Brown Bat in Baltimore Co., Maryland (4/24/2014). Photo by Scott Housten. (MBP list)

A Big Brown Bat in Worcester Co., Maryland (7/30/2014). Photo by Scott Housten. (MBP list)

A Big Brown Bat in Worcester Co., Maryland (7/26/2015). Photo by Scott Housten. (MBP list)

A Big Brown Bat in Harford Co., Maryland (1/10/2020). Photo by Dave Webb. (MBP list)

A Big Brown Bat found away from its roost in winter in Montgomery Co., Maryland (3/3/2014). This individual was taken to a wildlife rehabilitator. Photo by Karl Krueger. (MBP list)

A hibernating Big Brown Bat in Missouri (3/8/2012). Photo credit: Ann Froschauer/USFWS Photo by USFWS Headquarters. (MBP list)


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