Stercorarius skua (Brünnich 1764)

Atlas de poche des oiseaux de France, Suisse, et Belgique, utiles ou nuisibles :. Paris :Librairie des sciences naturelles P. Klincksieck,1898-. biodiversitylibrary.org/page/39512804

Coloured illustrations of British birds, and their eggs London :G.W. Nickisson,1842-1850. biodiversitylibrary.org/page/40372205

Ocean birds London,R. H. Porter,1887. biodiversitylibrary.org/page/13380137

Johann Andreas Naumann's ... Naturgeschichte der Vögel Deutschlands, nach einigen Erfahrungen entworfen. 13.T.Plates Leipzig :G. Fleischer,1820-1860. biodiversitylibrary.org/page/33755557

Skandinaviens fugle,. Kjøbenhavn,L.A. Jørgensen,1875-1879.. biodiversitylibrary.org/page/40094938

Familiar wild birds /. London ; New York :Cassell,1883.. biodiversitylibrary.org/page/23905868

British birds & their eggs :. London :W. & R. Chambers,1909.. biodiversitylibrary.org/page/14409655

Description: Picture taken off the coast of St Kilda, Western Scotland 2005. Date: 25 February 2006 (original upload date). Source: Transferred from en.wikipedia to Commons. Author: Psychofox at English Wikipedia.

Description: English: Great Skua at North Sea Island Hallig Hooge. Date: 9 April 2019, 14:31:51. Source: Own work. Author: Hobbyfotowiki.