Abstract
Abstract The results of routing counts of birds on the territory of the Pre-Altai Plain in the summer periods of 2003–2005 and 2014–2016 are analyzed. A total of 42 bird population options were used. Based on factor analysis, classification hierarchical schemes were compiled on the distribution of birds separately for the first and second half of summer. It has been shown that in the first half of summer most bird species prefer forests, open meadow–steppe, and field habitats, as well as floodplains. In the second half of summer, the general character of the distribution of species remains, but the proportion of the forest type of preference is reduced, and the meadow–field type comes out on top. A comparative analysis with similar classifications by the mountain provinces of Altai and the forest–steppe and steppe territories of the south of the West Siberian Plain is carried out.