If you look at the frog from underneath, you will be able to see its heart and other body parts. The nostrils are two little holes above the frog's mouth. The frog breathes in oxygen through its nostrils. The eardrums look like two flat circles just behind the frog's eyes. Hearing is very important to frogs.
Frogs croak and sing to send messages to one another.
It makes a clicking sound. We think he makes this sound to communicate with other frogs. It lives in the Pacific Coast. It makes this sound to communicate with other Pacific Tree Frogs. When I went to the youth expo I saw bullfrog tadpoles and bullfrogs.