Not all frogs can jump; some have legs that are too short. 1)
The skin of red-eyed tree frogs is usually light green. However, it can turn dark green or even reddish brown - depending on the frog's mood. 2)
As carnivores, frogs feed mainly on insects. However, they also occasionally eat smaller frogs. 3)
Glass frogs with transparent skin are good research models for physiology. 4)
Some frogs can lay as many as 4,000 eggs in frogspawn. 5)
The frog's eyes and nose are on its head, so it can breathe and see when most of its body is underwater. 6)
Frogs are known to close their eyes, but no confirmed brain scans have shown whether they actually have a true sleep period. 7)
Many of the most brightly colored tropical frogs are colored this way to warn predators that they are poisonous. 8)
When frogs hibernate, annual rings - similar to those of trees - form in their bones. This is how scientists can tell how old these animals are. 9)
Studies on frogs have shown that acetylcholine is responsible for transmitting nerve impulses. 10)
Frogs cannot live in the sea or in any saltwater. 11)
There were examples of frogs sent into space throughout recent history. 12)
Frogs can drink through their skin. Through an ionic gradient, they suck water through the skin of their abdomen. 13)
The world's largest frog is the shy Goliath frog from Cameroon, West Africa. 14)
In recent years, a painkiller 200 times more powerful than morphine was found in the skin of a frog. 15)
Frogs have 360-degree visibility - but they only see things that move. 16)