Archaeopteryx fossils show that the animal had feathers like a bird. It also had a bony tail, teeth, and claws on its wings like a reptile. Scientists claim this is evidence of a common ancestor. What makes this a sound claim? Birds and reptiles are warm-blooded organisms.
Archaeopteryx fossils share traits with both birds and reptiles.
Reptile species show evolutionary advantages over birds.
Fossils of birds, archaeopteryx, and reptiles were found together.