The Western Big-eared Bat is a medium-sized bat known for its large ears, which can be longer than its body. This species primarily inhabits forests, caves, and urban areas across the western United States. They are nocturnal and use echolocation to navigate and hunt for insects, primarily moths. These bats are social creatures, often roosting in groups. They prefer to roost in dark, secluded places like abandoned buildings or caves. The Western Big-eared Bat is considered a species of concern due to habitat loss and disturbances in their roosting sites, making conservation efforts important for their survival.