Enantiornithines (meaning opposite birds) were a large group of birds that lived during the Mesozoic era. Some were as big as hawks and others were as small as sparrows. Unlike birds today most of them had teeth.
Description[]
Enantiornithines raged from the size of a small chicken to a hawk. They were very similar to modern birds, although they still retained some non avian dinosaur traits, such as the presence of teeth in most species.
Classification[]
Enantiornithines and any other avian dinosaur genera are apart of the clade Avialae (which is the broad equivalent to the term "Bird"). Most enantiornithines are found in Asia. Notably in the Yixian and Jiufotang formations.
Paleobiology[]
Enantiornithes behaved much like modern day birds do. They are adapted for flight and most notably they had feathers which may have been used for warmth and for coloration. Enatiornithines were very widespread during the Cretaceous, and coexisted with various species of non-avian dinosaurs.
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