The answer is Archaeopteryx fossil share traits with both birds and reptiles
Archaeopteryx was a bird-like dinosaur. It lived in an archipelago
of islands that later formed Europe 150 millions of years ago. It was a
raven-size. It had a feather and wing and was able to fly. Despite
that, it was more similar to the dinosaurs than the modern birds, with its
sharp teeth, claws, and skeleton. Nevertheless, it represents
transitional fossil between reptiles and birds.
