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] Gaviiformes Wetmore & Miller, 1926 [monotypic] Family Gaviidae Allen, 1897 [monotypic] - divers Genus Gavia Forster, 1788 Gavia immer (Brünnich, 1764) - common loon