Red-eyed tree frogs are not endangered. But their habitat is shrinking at an alarming rate, and their highly recognizable image is often used to promote the cause of saving the world's rain forests.

The green-eyed tree frog has adapted its appearance to blend in with the moss-covered rain forests of Queensland, Australia. The frogs' coloration and markings vary with their specific habitat ...

The European tree ... frog likes to jump from shrubs to trees, Dr Moor explains, and is one of the most mobile species, capable of traveling several kilometres. It needs a very specific habitat ...