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1 | There have been analyzed the materials of the whole year round calculation of birds which were carried out within the limits of the administrative territory of the town of Lesosibirsk in Krasnoyarsk region from 2002 to 2005 (years) in four locations. With the help of classification of the regulated objects there were exposed the season periods of bird population in each location according to years and on the average for each location during all years of observation. According to the results of their comparison 7 general periods are determined and it is given their short quantitative characteristics. It is ascertained that according to years the number of seasons is more stable in taiga forests and in built up locations Keywords: . | 1397 |