Seasonal Features of the Territorial Distribution of Birds in the Sary-Chelek Biospheric Reserve (South-Western Tyan-Shan, Kyrghyzstan)
Results of passage route assessments of birds over the territory of the Sary-Chelek biospheric reserve during the years 1982-1991 are anаlyzed. The features of territorial distribution of species within all the landscapes of the reserve and types of preference of different habitats in different seasons were revealed with the help of factor classification on the basis of the indices of occurrence and numbers of 164 bird species. Seven types of preferences were revealed for spring, 10 for the first half of summer, 5 for autumn. The classification schemes on the basis of which one may consider natural regimes and factors of the environment determining bird distribution over the territory of the reserve during different periods of bird vital functions are anаlyzed.