Neornithes Gadow, 1893 - living birds Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900 Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988 Order [Psittaciformes] Wagler, 1830 [monotypic] - parrots Family Psittacidae Illiger, 1811 - cockatoos and parrots Subfamily Cacatuinae del Hoyo et al., 2014 see Family Cacatuidae Gray, 1840 Genus Nymphicus Wagler, 1832 [monotypic] 1 Nymphicus hollandicus (Kerr, 1792) - cockatiel