Field signs. Local name - grebenuha. Major duck. Weight males up to two kilograms. The inhabitants of the northern coastal waters and high-latitudinal Arctic tundra. Spina black, white neck, a noticeable white wing mirror. Łapy dirty-orange. Beak of male bright orange with a large outgrowths on the forehead. The flight time. Well nyryaet. The voice - a loud triple Creek "EAR EAR ... ... EAR ...", from females - flagrant" gag-gag-gag "(Syroechkovsky, Rogacheva, 1980).  Distribution. Grebenushka detected as a typical and quite normal nesting species Severnaya Zemlya (the October Revolution-in) (Belikov, Randla, 1987). For IV Semenov (1971), grebenushka nest and the archipelago Sedova. Cluster area in the Taimyr includes coastal Arctic tundra (Walter, 1902; Sdobnikov, 1959; Borzhonov, Saveliev, 1971; Vronsky, 1986, etc.). Distributed widely, but every nest density recorded in the East Taimyr, in the western part of the peninsula occurs relatively rarely (Borzhonov, Saveliev, 1971). There Yenisei Gulf and the valley Hatangi goes to the south to about 72 ° N Gnezditsya to the southern shores of Lake. Taimyr. At the seaside grebenushka everywhere usual, but at the northern Taimyr, in the arctic desert, its a little bit. Near Yenisei Gulf in the early twentieth century. was very extensive (Tugarinov, Buturlin, 1911). On inland waters grebenushki slightly. Slot in small numbers in the lower and middle river. Pyasiny; southern limit of its nesting here - lower reaches of the river. Agapy; near the mouth of the river. Dudypty grebenushki no longer nest, but sometimes fall here (Krechmar, 1966).
On finding a colony of 50 nests in the estuary of the river. Popigay told AS Martynov (1983) Tretyakov hunter from Khatanga. Nepolovozrelaya part of the population holds summer at sea, overflying cluster area of the wintering sites and back (Rutilevsky, 1957). Habitats. Prefers for nesting low-lying tundra (Rogacheva, 1988). Phenology. Spring arriving at the Taimyr - June 5-10, autumn departure - at the end of September. Migration routes go by sea to the west. Proletny way never passes on the mainland (Syroechkovsky, Rogacheva, 1980). Reproduction. Gnezditsya individual pairs (occasionally breeds colonial), often far from the sea. Jack - a dry hole in the ground under the protection of fin, stone or grass. Vystlano thick layer of dark ill-Pooh. Masonry - from the end of June, from four to six green or light olive eggs. Gaga is pegged to the young. In the case of death of young females to join other vyvodkam, forming a group to 15-18 chicks (Syroechkovsky, Rogacheva, 1980). Nutrition. Feeds aquatic invertebrates - C. finmarchicus, shellfish, etc. (Syroechkovsky, Rogacheva, 1980). Number. Ochag high population density type is on the Gulf Coast Hatangskogo and in the eastern sector of Taimyr, in the western part of the peninsula - in the mouths of rivers in Lower and Taimyr Pyasiny. The bulk of the population is concentrated in the Arctic tundra (61%); in typical tundra inhabited by 27%. Grebenushki number of Western groups in recent years, growing in the vicinity of Dickson (message ohotkorrespondentov) and in the central part of Taimyr. In the 1978-1981 biennium. in Krasnoyarsk strength averaged 190 thousand birds (Martynov, 1983). References. |
