Red-eyed tree frogs prefer mates whose croak vibrations they can feel

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Red-eyed tree frogs are more than twice as likely to select a mate if they can feel the vibrations of their call instead of only hearing it.

These small, bright green frogs (Agalychnis callidryas) are about the size of a chicken egg and are found in rainforests from southern Mexico to northern Colombia. When the males want to woo a female or ward off a rival, they use air sacs in their throat to send a chorus …