Field signs. Zoom in all the other skuas, with a small goose. All brown coloring, with lots of bright pestrin, particularly noticeable at zasheyke, back and chest. At the primary reasons makhovaya white spots - both top and bottom, much larger and brighter than that of other skuas. In proportions typical solidity, a large head, long and powerful beak, wings are relatively short and wide. The tail is short, slightly wedge-shaped, medium-steering only slightly issued for the tail cut. Young adults alike, painting a brown or sandy, especially from the bottom (of light can be Bottom-ryzhimi), seem more monotone than adults, with uncertain light pestrinami. Weight 1200-1650 g, body length 53-66, wing 38,2-42,8 cm, the magnitude of 125-155 cm (Ryabitsev, 2001). In gnezdovoe time of marriage and territorial Creek consists of several (4 to 20) disyllabic nasal yelling "piiyyaaa-piiyyaaa ..." A bird that normally stands on the land, filed a shell and pull in SELinux neck up and forward and back up prostiraya disclosed wings. With concern to the nest, predators and exile as pozyvki in flight publish short cries - "Huck", "hake", "hook", "ahh", etc. (Ryabitsev, 2001). Distribution. Gnezditsya mainly in the north Atlantic. Cluster area expands on the Arctic coast to the east. At the end of the twentieth century. first detected on nesting on Novaya Zemlya and-ve Vaygach. Few zalety registered in the Kara Sea, its beaches and bays, up to the south of the Ob and Yenisei Bay Bay (Ryabitsev, 2001). Reproduction. Gnezdyatsya from the sea by single pairs or sparse colonies. In laying 2, 1 egg less typical of the skuas colors, sizes 61-82 mm x 46-55. Nasizhivayut alternately on both adult birds 26-32 days. Downy chicks uniform brown or reddish-brown, lighter below. Becoming flight at the age of 40-50 days. It nests and chicks adult birds boldly attack both air and ground predators, including humans (Ryabitsev, 2001). References. |
