21. Eostrix
The Eostrix bird is a member of the Protostrigidae family. This is a species of extinct primitive owl. These owls are from the early Eocene era and primarily lived in Wyoming and the London Clay of England.
Paleontologists have identified two different species of Eostrix. The first is the E. Martinelli, which was discovered in 1972 in Cottonwood Creek, Wyoming. It was named after the researcher who saw it. The second species, the E. Mimica, is much smaller and has unique claws and feet that differ significantly from modern owls. Its size is similar to the long-eared owl that lives in Asia, Europe, and North America.