Neoaves is a clade that consists of all modern birds (Neornithes or Aves) with the exception of Palaeognathae (ratites and kin) and Galloanserae (ducks...

been proposed, such as the Mirandornithes, Cypselomorphae, Metaves, and Coronaves. Although groups such as the former two (uniting a few closely related...

(2004) proposed that Neoaves are divisible into two clades, Metaves and Coronaves, although it has been suggested from the start that Metaves may be paraphyletic...