Stercorarius nigricapillus Bergman, Fauna och Flora, vol. 18, No. 5, 1923, p. 232= Stercorarius pomarinus Temminck, 1815
Syntype : Male ad. (light phase), Taparkof, South-eastern Kamtchatka. 3. VIII. 1920. S. Bergman leg. No. 73. - Measurements of type : wing : 342 mm.; tail : 165 mm.; culmen : 40 mm.; tarsus : 50 mm.Click on the picture for enlargement.