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Western Mastiff

Scientific Name: Eumops perotis

Photo taken by Dick Wilkins

Description: The Western Mastiff bat (Eumops perotis) is very large, and can be picked out by is large ears. It has dark gray fur. Its total length can be up to 84 mm and this bat weighs up to 70 grams.

Distribution: This bat is rare in Texas
Map of the Western Mastiff Bat in Texas

About the Western Mastiff Bat: This bat prefers to roost in rock crevices on cliff faces in colonies averaging two to a dozen. They are insectivores. They echolocation calls are audible to humans. Females and males remain together throughout the year, even when pups are born. Females typically give birth to one pup, though occasionally twins are born.

Status: Least Concern
For more information go to the IUCN Red List Website for the Western Mastiff Bat

For more information go to the Texas Parks and Wildlife Western Mastiff Bat Fact Sheet

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