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] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
Family Laridae Vigors, 1825 - gulls, terns and skimmers
Subfamily Larinae Vigors, 1825 - gulls
Genus Larus Linnaeus, 1758
Larus cirrocephalus Vieillot, 1818 - grey-headed gull
1 Larus cirrocephalus cirrocephalus Vieillot, 1818
2 Larus cirrocephalus poiocephalus Swainson, 1837