Townsends Big-eared Bat

The Townsend’s big-eared bat has large rabbit-like ears and two lumps (pararhinal glands) on its snout. It’s a cavity-dwelling bat, typically found roosting in caves or mines. Ears erect when alert, curl like ram horns at rest or during hibernation.

  • Common Name:

    Townsend's Big-eared Bat

  • Scientific Name:

    Corynorhinus townsendii

  • Weight:

    8 to 14 grams

  • Conservation Status:

    Not Evaluated

  • Size:

    Wingspan: 12-13 inches

  • Where to See:

    Widespread across the west and in Arizona, though not common anywhere in the state


Townsend’s big-eared bats are slow-flying, highly maneuverable, and often forage near tree canopies and woodland edges. They eat moths, primarily. This bat typically roosts suspended from open cave ceilings or high walls, rather than within crevices. Maternity groups often form a dense cluster of adults and young to maintain high body temperatures and aid in development of young. A single pup is born between May and July.


The Townsend’s big-eared bat can be distinguished from other western bat species by its large, rabbit-like ears and club-shaped lumps on the muzzle. When alert, the ears are erect and facing forward. At rest and during hiber-nation, the bat curls its ears back like ram horns. This species is primarily a cavity-dwelling bat; most roost sites are in caves or mines.

Our Mission

To conserve Arizona’s diverse wildlife resources and manage for safe, compatible outdoor recreation opportunities for current and future generations.

Wildlife Viewing

See wildlife species in the wild.
The Wildlife Viewing Program is committed to achieving wildlife conservation by engaging the public in activities and with cams that increase awareness of and appreciation for wildlife garnering public support for the Department’s unique role in wildlife management. These practices ensure the continued existence of Arizona’s diverse wildlife and habitats by promoting sustainable viewing practices.

See more in the wildlife viewing sectin of the website

Subscribe to our Newsletter