Presbyornithidae

Presbyornis is an extinct genus of presbyornithid bird from North America during the Paleogene period, between the Late Paleocene and Early Eocene.

Presbyornithidae is an extinct group of birds found in North America, South America, East Asia, Australia and possibly North Africa. They had evolved by the Maastrichtian age of the Late Cretaceous and became extinct during the Aquitanian age of the Early Miocene. The family contains the oldest known neognath, Teviornis from the Nemegt Formation of Mongolia.