Field signs. Dark brown swift, throat and nadhvoste white. At the belly light flaky image. The tail is cut higher than the black swift. Often, flies, along with martin, which has size, speed, flight and voice. Voice not pronzitelen as a black swift, and reminds dissyllable «Russia-irr» (Syroechkovsky, Rogacheva, 1980).  Distribution. A typical East Asian type associated with rocks. In general, distributed in the province more black swift. It occurs mainly in the southern province, north to the Angara (Ptushenko, 1951), and the Lower Tunguska in its middle - up to 64 ° N (Tkachenko, 1937). In the taiga comes only goristomu right Yenisei. Perhaps it is this swift met once in the Yenisey, in the northern taiga of the village. Vereshchagin (Tugarinov, Buturlin, 1911). BN Andreev (1974) for upper Vilyuya notes belopoyasnichnogo swift as usual nesting birds on a steep cliff above Vilyuya and its tributaries. AA Vakhrushev found belopoyasnichnogo swift in 1978 in the watershed severotaezhnyh listvennichnikah of forty kilometers north of Tours. At srednetaezhnom right Yenisei, we also have seen this kind of (Peace, Upper Imbatskoe, Alin, downstream the river. Eloguy). In 1958, marked as usual nesting birds throughout Podkamennoy Tunguska - on the threshold of Oron upstream to the mouth (Syroechkovsky, 1959; Syroechkovsky, Rogacheva, 1980; Rogacheva, 1988). Birds gnezdilis colonies in large rocks on the banks of the river, especially on the threshold of Oron to Vanavary (Syroechkovsky, 1959). Large (at 50-100 pairs) nest colony of this type also met on the Angara at Motygina and the flow of the Angara - the river. Heater. There also Yenisey near the village Fomka (Burskiy. Vakhrushev, 1983) and. Vorogovo (Rogacheva et al, 1978). In the southern region, near Krasnoyarsk on the Yenisei and above, belopoyasnichny swift - large nesting birds wherever there are rocks, and in the Krasnoyarsk and its suburbs, it numbers many times greater than the black swift (Yudin, 1952). Unit found in plain taiga, for example, large and small Kemchugu, which breeds in the hollows of dry listvennits (Syroechkovsky, Rogacheva, 1980; Rogacheva, 1988).
Habitats. Colonies back from tens to hundreds of nesting pairs. Almost always they are located near large water surfaces, the rocky shores of rivers, cliff and precipice, in schelyah and deep burrows among the rocks at a height of two or three to several dozen meters from the foot of the rocks. Breeds in high buildings, almost entirely of stone (Syroechkovsky, Rogacheva, 1980). Phenology. Under the Krasnoyarsk arrives for an average of the Reserve «poles» June 7; full clutch at Atlanta - June 19-July 9, sletki - July 16, departure from the Krasnoyarsk on average - August 6, very late - 30 August (Krutovskaya, 1958; Yudin, 1952). Breeding. Flagrant jack piled stems from grains and gluing feathers and saliva. In laying 2, rarely 3 eggs (Syroechkovsky, Rogacheva, 1980). Nutrition. Feeds, and black swift, on-the-fly mostly dipterous insects and spiders (Syroechkovsky, Rogacheva, 1980). References. |
