When danger nears, orangutans warn their group with alarm calls, and new research shows that the animals sometimes cup their hands around their muzzles, making these calls louder and deeper.
The rest of the story
livescience.com
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Hear That? Orangutans Use Hands to Amplify Calls
When danger nears, orangutans warn their group with alarm calls, and new research shows that the animals sometimes cup their hands around their muzzles, making these calls louder and deeper.
The rest of the story
livescience.com
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