WALTHO, Chris M. Herring Gulls Larus argentatus in Common Eider Somateria mollissima feeding flocks a discerning kleptoparasite. Wildfowl, [S. l.], p. 41–52, 2013. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/153952. Acesso em: 16 dec. 2025.