Archosaurs are reptiles that are divided into two major branches: the bird-line, which includes pterosaurs and dinosaurs, including living dinosaurs (birds); and the crocodilian line, including ...

Mammal lineages are in red; diapsid reptiles, shown as archosaurs (birds, crocodilians and dinosaurs), are in blue; and lepidosaurs (snakes, lizards and relatives) are in green.

Before there were birds pterosaurs ruled the skies, soaring above the dinosaurs below. But only recently has the secret of their flight been revealed.

Feather and colour evolution Studies of colour in fossil birds and dinosaurs based on melanosomes in their feathers, and evolution of feathers and homologies of dermal structures across all archosaurs ...

Many dinosaur species became extinct around 66 million years ago, but a group of living dinosaurs are still with us today: birds. Dinosaurs are archosaurs, a larger group of reptiles that first ...