Alejandro Vélez: That call has two main functions. The same call helps to repel other males and to attract females. One of ...

Although it might be hard to steal a glimpse of the red-eyed green tree frog, the amphibian makes itself known thanks to its distinct call. Males communicate from deep within the vegetation near ponds ...

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 ...