Abstract
The article presents the results of ornithological studies carried out on the Ulagan plateau (Eastern Altai) due to increasing anthropogenic influence. This paper presents a species overview and features of the nesting biology of some species of the Anatidae Family. Considerable attention is paid to the features of spring arrivals, the course of nesting processes, spring and autumn migrations. The paper analyzes data on egg laying and nesting dates. This process includes such periods as: the beginning of oviposition, the period of mass oviposition and the latest ovipositions, the dates of the meetings of downy jackets, flaps, the dates of flights and the beginning of accumulations in preparation for long-distance migration are described. In the territory of the Altai Republic, this problem has been little studied and requires further research.
Highlights
The last decades have been characterized by a significant increase in anthropogenic impact on the nature of Gorny Altai
Waterfowl are represented by the following orders: Anseriformes, Gaviiformes, Podicipitiformes, and some Gruiformes
Anser indicus On the Ulagan Plateau, we first encountered it in the valley of the Lower Ildugem River
Summary
The study area, in recent years, has become very popular among tourists who make a significant contribution to the anthropogenic load in the territory of the original habitats of aquatic and near-water birds. In this regard, the study of the avifauna of mountain reservoirs is quite relevant. A significant part of the studied representatives of the avifauna are of interest from the point of view of biodiversity, and have a hunting and commercial value These are traditional hunting grounds for the local population and tourists
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