For mammals, external ear parts are needed for guiding sound into the ear canal and figuring out where a sound comes from.
From Ornithology #7 How Do Birds Hear?
On the bottom of page 4
Bird Fact
1 minute
For mammals, external ear parts are needed for guiding sound into the ear canal and figuring out where a sound comes from.
From Ornithology #7 How Do Birds Hear?
On the bottom of page 4
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