Amphibians are cold-blooded animals that can live both in the water and on land. When we think of amphibians, frogs and toads instantly jump to mind. Usually, we think of frogs as being quite small.

Bullfrogs are fascinating amphibians with an impressive repertoire of sounds. Their name comes from the male’s deep, resonant “mooing” call, which sounds a lot like a cow or bull. However, the weird ...