E. mimica (Wetmore, 1938) E. martinellii Martin & Black, 1972 E. vincenti Harrison 1980 E. tsaganica Kurochkin& Dyke 2011 Eostrix is a genus of extinct primitive owls in the family Protostrigidae, along with Oligostrix and Minerva.

[1] These owls date from the early Eocene of the United States, Europe, and Mongolia.

The genus was created by Pierce Brodkorb in 1971 to place a fossil species known until that time as Protostrix mimica.

The following species are recognised: In 2016, Gerald Mayr described E. gulottai from the early Eocene Nanjemoy Formation in Virginia.

[5] However, in 2022, Mayr, alongside Andrew C. Kitchener, moved 'E.'