Neornithes

Translingual thumb|Aix galericulata species [[File:Pair of Merops apiaster feeding.jpg|thumb|''species}} Etymology From mul grc - prefix grc νεο-, from grc νέος new, young and grc ὄρνις bird. Proper noun clade class Reptilia all modern birds, characterized by many adaptations for flight, such as a four-chambered heart and feathers, and differentiated from other, older birds by having a beak with no teeth Hypernyms infraclass ; Carinatae subclass Hyponyms infraclass Palaeognathae superorder, Neognathae infraclass, Odontognathae parvclass (not included in some systems) parvclasses References Modern birds