Eastern Red Bat Lasiurus borealis Müller, 1776  Synonyms: LASBOR.

Status:

Widespread in the eastern U.S. Our most common tree bat species. Eastern Red Bat generally roosts in trees by day, but during cold weather may crawl beneath the leaf litter. Bats in the northern part of their range migrate south for the winter. (Migrants have been detected even over the ocean on pelagic trips.) Overwintering individuals are often active on mild mornings and evenings. Their solitary nature and use of trees rather than caves probably make this species less affected by White Nose Syndrome than other species.

Description:

Evening Bat and Eastern Red Bat call structures and characteristic frequencies overlap. However, characteristic frequencies of Eastern Red Bat call pulses typically vary within a call sequence, while those of evening bats are usually more consistent (B. Neece, pers. comm.). Calls also similar Tri-colored Bat and nearly identical to the locally much rarer Seminole Bat.

Relationships:

Insectivorous.

There are 76 records in the project database.

Search Google Images

GA AL WA FR CL MO HO BA BC HA CEPG AA CV CH SM KEQA CN TA DO WI SOWO 
One of several Eastern Red Bats encountered well offshore in Maryland waters on a pelagic trip out of Ocean City (9/30/2012). Photo by Clive Harris. (MBP list)

An Eastern Red Bat in Calvert Co., Maryland (6/25/2019). Photo by Ben Springer. (MBP list)

An Eastern Red Bat in Baltimore Co., Maryland (12/21/2018). Photo by Mark Johnson. (MBP list)

An Eastern Red Bat in Baltimore Co., Maryland (4/4/2013). Photo by Frode Jacobsen. (MBP list)

An Eastern Red Bat in Howard Co., Maryland (12/1/2014). Photo by Bonnie Ott. (MBP list)

An Eastern Red Bat roosting in Garrett Co., Maryland (4/16/2004). Photo by Boyer and McDowell. (MBP list)

An Eastern Red Bat in Wicomico Co., Maryland (3/30/2013). Photo by Mark Johnson. (MBP list)

An Eastern Red Bat in Harford Co., Maryland (3/1/2016). Photo by Matthew Addicks. (MBP list)

Eastern Red Bat in Caroline Co., Maryland (2/7/2017). Photo by Wayne Longbottom. (MBP list)

An Eastern Red Bat in Baltimore City, Maryland (12/1/2017). Photo by Edwin Guevara. (MBP list)

An Eastern Red Bat in Calvert Co., Maryland (6/30/2017). Photo by Ben Springer. (MBP list)

An Eastern Red Bat in Calvert Co., Maryland (10/30/2018). Photo by Ben Springer. (MBP list)

An Eastern Red Bat in Howard Co., Maryland (4/14/2014). Photo by Kyle Drummond. (MBP list)

An Eastern Red bat in Passaic Co., New Jersey (3/31/2006). Photo by Anita Gould. (MBP list)

An Eastern Red Bat in Harford Co., Maryland (7/14/2018). Photo by Dave Webb. (MBP list)

An Eastern Red Bat in Harford Co., Maryland (7/14/2018). Photo by Dave Webb. (MBP list)

An Eastern Red Bat roosting in Howard Co., Maryland (8/12/1978). Photo by Joanne Solem. (MBP list)


View All Images

Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

View Bibliography