Features of formation the specific birds population on western macroslope of Barguzinskiy ridge (Northeast Pribaikalye)

Results of 24-years monitoring of birds population on western macroslope of Barguzinskiy ridge are presented. Optimum and suboptimum habitance places for 11 kinds leading in numerosity 11 kinds of birds from key field are shown. Incomplete concurrence of fields to high numerosity and minimal variability of abundance for the kinds having a wide spectrum of habitant places with high population density is noted. On character of an-nual distribution on fields kinds have been divided into 2 groups: with a high degree of synchronism of spe-cific abundance changes (Sitta europaea, Parus ater, P. montanus, Phylloscopus proregulus, Ph. inornatus, Tarsiger cyanurus, Spinus spinus, Motacilla cinerea) and with asynchronous type of numerosity changes (An-thus hodgsoni, Phylloscopus trochiloides, Tetrastes bonasia). Asynchronous changes is accompanied by inter-annual redistribution of specific abundance within the limits of different high-altitude fields and between ad-joining river valleys.