Nesting of the osprey (<i>Pandion haliaetus</i> Linnaeus, 1758) in the Shushensky Bor National Park

The paper deals with the dynamics of nesting of the osprey (Pandion haliaetus Linnaeus, 1758) in the Shushensky Bor National Park and on adjacent sites in the valley of the Yenisei River, associated with the emergence of the Sayano-Shushenskaya hydroelectric power station reservoir. The paper contains data on the nesting of the osprey directly on the territory of the Mountain Forestry of the National Park. Special attention is paid to one of the discovered nests. To build nests, the osprey in the Siberian region usually chooses high-stemmed dry or semi-dry trees with broken tops, and one of the tricks when choosing a nesting site is the elevation above the general level of the surrounding forest to provide a circular view. In this case, the nest was located on the broken top of a live cedar growing on a steep slope in a fir-cedar forest. There were taller trees nearby, i.e. the nest did not dominate in height. During observations of osprey nests, it was found out that they reacted very negatively to the appearance of any watercraft in the bay. If the adult birds were in or near the nest, they flew from a great distance and did not fly close until the boat or motorboat was removed, which, of course, threatened the eggs (when incubating) or chicks during the first weeks after hatching, hypothermia and possibly death. Recommendations are given for the conservation and study of the biology of this rare red book species in the habitat conditions on the mountain-taiga coast of the Sayano-Shushenskaya hydroelectric power station reservoir within the national Park.