English Filipino French German Italian Portuguese Spanish About this Translator
Home / All About Bats / Species Profiles
BCI Species Profiles

© Merlin D. Tuttle, BCI

Eumops perotis

 greater bonneted bat (Molossidae)
 Eumops perotis
 greater bonneted bat

 Family Name: Molossidae
 Genus: Eumops
 Species Name: perotis

 Pronunciation: you-mops per-oh-tis
 Common Name: greater bonneted bat

The greater bonneted bat is the largest bat in the U.S., with a wingspan approaching two feet. It is found in California, Nevada, Arizona, Texas and Mexico though it is rarely encountered in large numbers. Almost nothing is known about the behavior or status of western mastiff bats. Because they roost in cliff-face crevices and feed high above the ground, they are rarely seen and approach the ground only at a few select drinking sites.

This bat is severely limited by available drinking water. Its long, narrow wings preclude it from drinking at ponds less than 100 feet long. Apparently, due in large part to the loss of large natural springs, western mastiff bats are no longer found in many previously occupied areas and may be endangered, though past and present observations are too few to determine their status.

Approximate Range:

Source: IUCN Red List

<< Prev | Back to Species | Next >>
Unless otherwise noted, all images are copyright ©Merlin D. Tuttle and/or ©Bat Conservation International