A hundred or more small brown-ish bats hanging upside down together in a cave

Gray bats at Fern Cave National Wildlife Refuge

More than 1 million gray bats hibernate each winter at Fern Cave National Wildlife Refuge in Alabama.
Image
Photo By/Credit
Jennifer Pinkley/USFWS volunteer
Ecosystem
Caves and Karst
Media Usage Rights/License
Public Domain
Subject tags
Mammals
Pollinators
Wildlife