Native
Introduced
Reintroduced
Vagrant
Native (uncertain presence)
Regionally extinct vagrant
Regionally extinct
Synonyms : 灰头鸥 (cn), racek šedohlavý (cz), Graukopfmöwe (de), Gråhovedet Måge (dk), Grey-headed Gull (en), Gaviota Cabecigrís (es), harmaapäälokki (fi), Gabbiano testagrigia (it), ズアオカモメ (jp), Grijskopmeeuw (nl), Gråhodemåke (no), mewa szarogłowa (pl), Gaivota-de-cabeça-cinzenta (pt), Сероголовая чайка (ru), Gråhuvad mås (se), čajka sivohlavá (sl), Gryskopmeeu (za)
Grey-headed Gull