In behavior never before recorded by scientists, researcher Michael Caldwell of Boston University and his colleagues used infrared cameras at the Smithsonian Tropical Research Institute in Panama to capture male red-eyed tree frogs shaking their rumps and entire bodies to show dominance.
“This shaking, known as tremulation, is a form of communication between male tree frogs…They’re claiming territory for their ‘calling area’ where they spend the night calling for a female mate. Sometimes, the shaking leads to wrestling among males….”
See the booty-shaking video here at News.NationalGeographic.com.
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