Notable anatomic features include a coracoid with a deep pit for the ball-and-socket joint of the shoulder, comparable to that of Quercypsitta.

The humerus is built in a manner resembling birds of prey like hawks and falcons.

The tarsometatarsus, the leg bone immediately above the foot, is short and stocky.

Vastanavids had partially zygodactyl feet, as shown by skeletal features of the tarsometatarsus.

Sites bearing vastanavid material include the Cambay Shale Formation in Gujarat province, India, where numerous bones of two species of Vastanavis have been found in a lignite mine.