The Southern leopard frog sounds like it's laughing when making its calls, and the spring peeper imitates the clucking of a chicken. When the green tree frog of Arkansas revs up, its croak sounds like ...

I have a 1-year-old and a 3-year old, which means I spend a ridiculous amount of time making animal sounds. The protagonists of the books I read to them are bears, ducks and cats. The songs I belt out ...

The Acoustic Atlas’ trove of recordings includes grizzly cubs purring, ice freezing and thousands of other elusive sounds. What sound does a frog make? If you say ribbit! you would be right. And wrong ...