"Ancient Wing"

Archaeopteryx is a genus of bird-like dinosaurs that is transitional between non-avian feathered dinosaurs and modern birds. Despite their small size, broad wings, and inferred ability to glide, Archaeopteryx had more in common with other small Mesozoic dinosaurs than with modern birds. In particular, Archaeopteryx had many non-avian theropod dinosaur characteristics: jaws with sharp teeth, three fingers with claws, a long bony tail, hyperextensible second toes ("killing claw"), feathers (which also suggest warm-bloodedness), and various features of the skeleton. Although they had feathers and primitive wings, they lacked a well developed sternum and were not able to have powered flight as do modern birds.

(See Archaeopteryx)