Townsend's Big-eared Bat is a medium-sized bat known for its large, distinctive ears that can be longer than its body. This species primarily inhabits forests, caves, and abandoned buildings across western North America. They are nocturnal and use echolocation to navigate and hunt for insects, particularly moths. These bats are social creatures, often roosting in small groups. They are sensitive to habitat disturbance, making conservation efforts important for their survival. Townsend's Big-eared Bat is listed as a species of concern in several regions due to declining populations from habitat loss and human activities.