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

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.