Head to head
Townsend's Big-Eared Bat vs Spotted Bat
Townsend's big-eared bat and the spotted bat both carry some of the largest ears of any North American bat, but they use their hearing in different ways and respond very differently to human disturbance.
| Townsend's Big-Eared Bat | Spotted Bat | |
|---|---|---|
| Scientific name | Corynorhinus townsendii | Euderma maculatum |
| Ear feature | Curled like rams’ horns at rest | Nearly as long as the body |
| Echolocation calls | Typical bat frequency, inaudible to humans | Unusually low, audible to humans |
| Sensitivity to disturbance | Extremely high, can abandon roosts | Less specifically documented |
| Coat | Plain brownish fur | Bold black-and-white spots |
| Conservation status | Least Concern | Least Concern |
| Population trend | Decreasing | Unknown |
| Habitat | Mountains, forest | Desert, mountains |
Townsend's Big-Eared Bat vs Spotted Bat: common questions
Which bat has the more distinctive ears, Townsend’s big-eared bat or the spotted bat?
Both have exceptionally large ears for their body size, but Townsend's big-eared bat is best known for curling its ears back like rams' horns while resting, while the spotted bat pairs its equally oversized ears with a bold black-and-white spotted coat that makes it one of the most visually distinctive bats in North America.
Can people actually hear the spotted bat calling?
Yes, this species produces echolocation calls at an unusually low frequency, low enough that many people can hear the calls directly without any specialised detection equipment, a rare trait since most bat echolocation sits far above the range of human hearing, including that of Townsend's big-eared bat.
Why is Townsend’s big-eared bat so sensitive to human visitors?
This species is unusually sensitive to disturbance at its roost sites, and repeated human visits to caves or mines can cause an entire colony to abandon the site permanently, making undisturbed roost protection a much higher conservation priority for this species than for the spotted bat.