Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Order Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters Family Cuculidae Vigors, 1825 - cuckoos Family Musophagidae Bonaparte, 1831 - turacos Family Opisthocomidae Swainson, 1837 - hoatzins