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Because they mostly fly at night. They use echolocation to find obstacles and prey. They use those big ears in the echolocation.

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15y ago

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Why do some bats have large ears?

Bats with large ears have evolved this trait to enhance their ability to navigate and hunt using echolocation. The big ears help these bats detect and interpret sound waves more effectively, allowing them to locate prey and avoid obstacles in the dark. Additionally, the size of their ears can also help regulate body temperature and aid in communication with other bats.


Why do bats have small ears?

Not all bats have small ears. In fact, many have quite large ears. The spotted bat and Townsend's bat (just to name a few) have ears that touch the middle of the back when laid flat. These bats can also roll their ears to help protect them from the cold or during periods of rest.


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