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Wonderfully Wild Wednesday: Sing it!

Posted by: Rebecca Whitham, Communications

Early in the morning, the tropical rain forest usually resonates with "singing" siamangs whose call is so loud it can be heard for up to 3 miles. 

How can they project so far? That hairless throat pouch blows up to act as a resonator that enhances the carrying of their call.

Photo by Dennis Conner/Woodland Park Zoo.