New research by Smithsonian scientists suggests that preferences for certain sounds might be evolutionarily conserved ...
Add Yahoo as a preferred source to see more of our stories on Google. A male hourglass tree frog (Dendropsophus ebraccatus) with an inflated vocal sac used to produce calls. (Ryan Taylor) Your taste ...
From the eerie croak of a tropical frog to the haunting call of the howler monkey, the animal kingdom is filled with some wild and wacky mating calls. But which do you find the most appealing?
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