
- A frog's tongue is attached at the front of the mouth instead of at the rear, and is covered with a sticky substance which it uses to catch insects.
- Frogs use vocal cords to croak.
- Most frogs breathe through both their skin, mouth and lungs (tadpoles use their skin and gills).
- Frogs are cold-blooded, although they don't normally bask in the sun (the sun dries them out too quickly).
- Certain species of frogs may call at a certain "private" frequency which is not used by other nearby frogs - the call is transmitted within a separate sound range.
- Sometimes frogs simply "time-share" their croaks - maybe croaking at different times of the day or between their neighbours' croaks.
- Frogs may also be "tuned" to hear certain frequencies very clearly so that they may hear potential mates over the calls of other frogs.
- The Puerto Rican white lipped frog (Leptodactylus albilabris) actually calls as well as transmitting vibrations through the ground: it does this by partially burying itself in the ground and when its vocal sac expands in a croak, vibrations are transmitted through the ground.
- Similarly, the female Malaysian tree frog (Polypedates leucomystax), which may often be found on floating vegetation, taps its toes on reeds or grass to attract mates (this is unsual in a number of respects it is the female doing the calling and a ground dwelling animal is using something other than the earth to transmit signals).
- The size of a frog will affect the frequency (sound) of its croaks: large frogs have deep voices whilst small frogs have higher voices.
- Q: What does a bankrupt frog say?
A: "Baroke, baroke, baroke."