World's Oldest Known Bird: Photos
The skeletal remains of Aurornis xui date to the Middle to Late Jurassic period.
Jonica Dos Remedios/Claude Desmedt/IRSNB
Skeleton and reconstruction of Aurornis xui, the world's oldest known bird.
A reconstruction of Aurornis xui, envisions the bird having grey-toned feathers, with distinctive markings on its wings and legs.