Field signs. Outwardly similar to burogolovoy gull. Adult birds are that the brown head on the back of his head and neck from them going into a black, there are some differences in color and primary makhovaya feathers. The adult birds back and upper wings sizovato-gray-brown head Coffee Shop, rolling in a black-on temeni, the back of his head and the bottom of the throat; over the eye and behind the white semiring. Dark-red beak. Young birds after the first autumn with a white head molts kaplevidnymi brown pestrinami, tail with a dark stripe predvershinnoy. Wing 322-352 mm (Ivanov, Shtegman, 1978). Distribution. Jacks on Toreyskih lakes in the Chita region, occasionally fall in other parts of Southern Siberia (Böhme et al, 1998). References. |
