Millions of years ago there lived many weird and wonderful ancient reptiles. Some were aquatic and some lived in the skies and a few looked similar to the mammals living today.
These non-dinosaur reptiles are often mistaken for dinosaurs but they did not have the physical characteristics that define a true dinosaur.
Discover more about some of these non-dinosaur reptiles and see illustrations for each one.
Mosasaurs, ichthyosaurs and plesiosaurs were all aquatic reptiles living millions of years ago. Learn about some of the animals in this group below.
The flying reptiles are called Pterosaurs. They ruled the skies from the late Triassic Period to the end of the Cretaceous Period. Find out more.
Mammal-like reptiles were the prehistoric reptilian ancestors of mammals, and were the dominant land animals around 260 million years ago. Can you see any similarities with modern mammals?