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 Passerimorphae Sibley et al., 1988
Order Ciconiiformes Bonaparte, 1854
Suborder Charadrii Huxley, 1867 - shorebirds
see Order Charadriiformes Huxley, 1867
Infraorder Charadriides Huxley, 1867
Parvorder Charadriida
see Superfamily Charadrioidea Vigors, 1825
Superfamily Laroidea Vigors, 1825
Family Laridae Vigors, 1825 - gulls, terns and skimmers
Subfamily Larinae Vigors, 1825 - gulls
Tribe Larini Vigors, 1825 - gulls
see Subfamily Larinae Vigors, 1825
Genus Larus Linnaeus, 1758
Larus cirrocephalus Vieillot, 1818 - grey-headed gull