Peculiarities of the Nesting Ecology of Some Mass Bird Species in the Conditions of the Fergana Valley

Abstract

This article is devoted to the features of the nesting ecology of some common bird species in the Fergana Valley. Data on the distribution, distribution by nesting stations, clutch size, oological indicators of eggs, density of incubation of clutches and postembryonic growth and development of chicks of the white stork, green bee-eater, myna, Indian and field sparrow in the anthropogenic landscapes of the valley are given. In the Fergana Valley, the white stork is distributed mainly in settlements, the green bee-eater nests on loess cliffs along the banks of the river of large canals, the myna nests in anthropogenic objects, occupies the nests of rollers, Indian sparrows, the tree sparrow nests in anthropogenic landscapes, rarely in ravines, Indian Sparrow mainly lives in ravines and trees, forming large colonies. The clutch size for storks is on average 4.7, for bee-eater — 5.5, myna — 4.6, field sparrow — 4.5 eggs, Indian sparrow — 3.9 eggs. The density of incubation of eggs in a stork at the beginning of incubation is 96.3%, bee-eaters — 68.0%, myna — 67.7%, field sparrow — 93.1%, Indian sparrow — 92.4%, at the end of incubation, the incubation density changes and is 89.9% for the stork, 94.0% for the green bee-eater, 82.5% for the lane, 98.2% for the field sparrow, and 97.3% for the Indian sparrow.