Clade of saurischian dinosaur, placed with the clades Theropoda, Tetanurae, and Avetheropoda, Coelurosauria, Maniraptoriformes, Maniraptora, and Avialae. Colloquially known as birds.
The Latin word for "bird" and also the name of the class of animals that consists exclusively of birds. Purple Martins are in the class Aves, the order Passeriformes, the family Hirundinidae, and the genus Progne.