ИСТИНА

We collected data for characterize bird populations of Tobolo-Irtysh steppe and forest-steppe, forest-field, forest-meadow and meadow-field types. The tendency to increase the list of dominant species was noted in the period of seasonal migrations. The other leaders Paddyfield warbler (Acrocephalus agricola), Coot (Fulica atra) and Pochard (Aythya ferina) are confined to water bodies, and widespread synanthropic prevail in the residential part of the study area. Quite unexpectedly, due to the increased feeding behavior on solid waste landfills, the list of leaders is complemented by Yellow-legged Gull (Larus cachinnans). On water bodies and streams, the list of the prevailing species in the second half of summer includes Mallard (Anas platyrhynchos), Northern Pintails (Anas acuta), Tufted Duck (Aythya fuligula), and Avocet (Recurvirostra avosetta) and the Little Stint (Calidris minuta) on light-salted lakes. In steppic habitats the list complements with Common Kestrel (Falco tinnunculus). In winter, the list of leaders in the built-up part of the steppe and forest-steppe remains dominated by synanthropic species House Sparrow (Passer domesticus), Tree Sparrow (Passer montanus). Other changes in the summer list of dominant are manifested by the presence of tundra and taiga wintering species in it. In forested habitats it is Bullfinch (Pyrrhula pyrrhula). These species are found mainly in afforested and forest-stepped forest-steppe and meadow-field units. In open meadows, fields and steppes among the leaders are the Goldfinch (Carduelis carduelis), White-winged Lark (Alauda leucoptera), Snow Bunting (Plectrophenax nivalis), Snowy Owl (Bubo scandiacus) and Eurasian Jackdaw (Corvus monedula). At the same time, the anthropogenic transformation of steppe and forest-steppe landscapes unambiguously leads to an increase in the abundance of common and widespread bird species on the urban areas of Western Siberia.