THE ECOLOGY OF BREEDING BIRDS OF STEPPE LANDSCAPES BAIKAL SIBERIA
We generalized our and literature data about breeding ecology of steppe landscapes Baikal Siberia. We determined some general and specific for each species patterns of adaptation to regional conditions on the northern periphery of areas for most species. The variety of nesting biotopes goes down on the northern periphery. The time of breeding is wide and takes more than 5 month from the late winter till the end of summer. The majority of species start breeding in the same time, late coming species has a short mating season. Most species have one generative cycle in contrast to populations in the deep of area. Common continuance of nesting period in different species is markedly different, the shortest period has Blyth's Pipit (35-45 days) and the longest have Steppe Eagle and Eastern Imperial Eagle (115-125 days). Efficiency of nesting is comparatively high.