Cuspirostrisornis houi, a member of the Enantiornithes from early Cretaceous China (Jiufotang Format

Cuspirostrisornis houi, a member of the Enantiornithes from early Cretaceous China (Jiufotang Formation, ~120 mya). They shared their forests and wetlands with creatures like the more famous PsittacosaurusandMicroraptor.

With a skull only an inch long, Cuspirostrisornis was roughly sparrow-sized. And like many other Enantiornithes, they probably did not have a full tail fan - just a floofy butt with two long ornamental feathers.