or log in
Freshwater fish used as food in many parts of the world.
The main characteristic of the rhinoceros is the horn at the front of its skull, which it uses...
A transitional form between fish and tetrapods, or four-limbed vertebrates.
A species of snake widespread in Europe and Asia.
The largest species of lizard that lives in isolation. Even a single bite of it can be fatal.
A prehistoric amphibian and an early representative of the Tetrapods, which became...
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the...
Extinct species of fish which had thick ´armour´ protecting the head.