distribution

THE TENGMALM’S OWL (AEGOLIUS FUNEREUS) (STRIGIDAE, AVES) IN THE NORTH CAUCASUS

Tengmalm’s Owl (Aegolius funereus caucasicus But.) inhabits dark coniferous, pine and deciduous forests in the mountains of the North Caucasus from the City of Tuapse in the west to the Inner Dagestan in the east, rising to pine forests to a height of 1,900 - 2,000 m above sea level. During its winter wanderings it occasionally occurs in the foothills, but almost does not go out to the piedmont plains. Winter records in the steppe regions of Ciscaucasia may refer to nomadic specimens of a nominate subspecies (A. f.

ABUNDANCE OF TETRAX TETRAX L. 1758 (OTIDIDAE, AVES) IN THE SARATOV REGION

Authors: Oparin M. L., Kondratenkov I. A., Oparina O. S., Mamayev A. B.

Based on the count data obtained by various methods and their statistical processing, the abundance of the autumn population of Tetrax tetrax in the Saratov Trans-Volga region was estimated from the late 1990s till now. From 2012 to 2016 it averaged about 30,000 individuals, and in the Right Volga Bank region it was one or two orders lower, the species’ distribution there was sporadic. When studying the T. tetrax abundance dynamics, an increase in its population on the studied territory in the first half of the 2000s was established.

Northern Urals bird classification by similarity of their distribution and residence time

Authors: Livanov S. G.

Year-round route surveys of birds on a flat section of the Pechora-Ilytch biosphere reserve were conducted in 1995–1997. In total, 7 habitats were surveyed for the two years, 1,500 km of counts were travelled, and 136 bird species were met. Using multidimensional factor analysis, it has been established that in the Northern Ural region, during their stay in the course of a year, 50 (37%), 70 (51%) and 16 species (12%) prefer wood, villages, and semi-open and open wetland habitats, respectively.