Birds of average Siberia

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Family duck Of anatidae

Red-headed to turn black,
Red-headed pochard

Aythya of ferina L., 1758

Name of view of other languages

Field signs. Duck of average value. Weight of 800-1000 g. head and neck chestnut- reddish. Breast and to [nadkhvoste] black. Female is brown. There is no mirror on the wing. It dives well. From the water rises heavily, the flight rapid and noisy. Voice of drake in spring - unique whistle, female - the hoarse sharp croaking [kerr] ([Syroechkovskiy], [Rogacheva], 1980).

Area of the form Propagation. In the small number (considerably thinner frequent than the golden-eye and crested to [cherneti]) regularly it nests in the Minusinsk basin. Here, in the upper reaches Of [chulyma], is located the center of the increased density of nesting red-headed pochard ([Martynov], 1983). There is the assumption about the expansion of the area of this form to the north on the valley of the Yenisey and in eastern [Evenkii] ([Martynov], 1983). The individual cases of nesting north of the Minusinsk basin are known: in 90 km it is lower than Krasnoyarsk in the Yenisey (Yudin, 1952), on r. [Sym] ([Isakov], 1952). Under Krasnoyarsk on May 13, 1910. was observed the abundant flight of this duck, noted as exceptional phenomenon ([Tugarinov], [Buturlin], 1911). The separate encounters of this pochard are noted in the Yenisey still north: in the settlements Of [komsa], peaceful, Verkhne-Imbatskoye, even near Dudinka and in The [khantayskoe] lake ([Syroechkovskiy], [Rogacheva], 1958; [Syroechkovskiy], 1961). Nesting in these places is not established. In 1966. in eastern [Evenkii] in the upper reaches Of [vilyuya] nesting red-headed pochard established [B].[N]. Andreev (1974) on r. Of [posporin]. Here pochards although [malochislenny], nest regularly ([Rogacheva], 1988). Red-headed pochard - background form of the lake complexes of the south of Yenisey Siberia with the expanding northwards area. It is frequent under g. by Krasnoyarsk. On the separate islands Of [motyginskogo] [mnogoostrovya] at the beginning September 1994. even it prevailed among the [nyrkovykh] ducks, anticipating golden-eye and crested to turn black. However, manifesting clear [biotopicheskuyu] confinement, north the reservoirs of steppe and forest-steppe zones is encountered sporadically, avoiding boreal scaffolding (Savchenko and others, 2001).

In the ponds of the rivers of Yenisey plain - rare [nyrkovaya] duck. In spring 1998 g. (on May 17 to 22) several red-headed pochards have noted we on the river bed Of [syma] and in the [starichnykh] lakes in trading station [Sym]. According to interrogatory data, it in the small number nests on the floodland reservoirs of this river. The separate groups of red-headed pochards were encountered on the [starichnym] lakes r. Of [syma] with [aviaobsledovanii] in 1988. and 1998 g. on r. To [tyme] they are traced to Lake. [Komgol] (average flow), where on August 5, 1967. were obtained the half grown nestlings ([Gyngazov], [Milovidov], 1977).

Red-headed to turn black have noted we during nesting in The [gagulskaya] basin (Western [Sayan], 1000 m above sea level) as rare form, in its fraction were fallen about 2% of the number of remaining ducks ([Baykalov], [Laptenok], 1996).

Places of inhabiting. Lakes with the brushwood of reed and river with deep reaches (Bohme and others, 1998).

Multiplication. It nests in the creases of reed, forming sometimes high jack concentrations. Laying - 6-12 large greenish or olive eggs ([Syroechkovskiy], [Rogacheva], 1980).

Nourishment mixed - animal and plant fodders ([Syroechkovskiy], [Rogacheva], 1980).

Number. According to the data OF [A].[S]. Of [martynova] (1983), 31% of resources of form are located in the steppe localities, 44% of all birds are timed to the agricultural [lesopolnoy] part of average Siberia. According to the data of the same author, the number of red-headed pochard in the recent decades noticeably grew: autumnal total number in 1978-1981 g. - 30 thousand birds ([Rogacheva], 1988). To the beginning of the 90's [KHKH] v. the number of red-headed pochard was evaluated not less than at 50 thousand birds (Savchenko and others, 2001).

Bibliography.

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