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Long-term studies on the winter bird communities in the West Siberian Plain on a landscape basis allowed us to reveal the regional and seasonal patterns of their distribution. The highest proportion of species demonstrate forest-steppe and forest preference, a lower proportion demonstrate aquatic-semiaquatic preference, and the lowest proportion demonstrate tundra-forest-tundra preference. The preference zones do not change or extend in the winter period relative to summer postnesting period only in a small fraction of species; while the preference zones of most species were reduced or shifted. Commonly, the zonal borders of preferred habitats shifted southward to better climatic, feeding, and safety conditions. Only separate species with seasonally changing and specialized feeding demonstrated a northward shift of these borders.

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