Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893 Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988 Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988 Superorder Psittacimorphae Huxley, 1867 1 Order Psittaciformes Wagler, 1830 - parrots