Autumn migration of passerine (Passeriformes) on the putorana plateau

The eco-geographical differentiation and dynamics of autumn migration of passerines of the Putorana Plateau are analyzed. Eight points in the western and central-axial parts of the region were surveyed using the route census method. All registered species (n = 42) fly along a narrow coastal-edge strip along the banks of large rivers or lakes in the southern, southwestern and western directions. The population density of birds is 239 to 643, on average (n = 8) – 440 individuals/km². It is maximum in the south of the area, less in the middle part of the region, and minimum in the north of the plateau. During the most intensive flight, the population density at the points of multi-day observations was 420 to 796, on average (n = 2) – 608 individuals/km². For most species, the average duration of the entire autumn flight is 20 to 26 days, with the main one lasting for 7 to 12 days. The autumn migration configuration is a combination of four waves with four well-defined maxima. The most pronounced rises in migration activity are associated with a decrease in air temperature. The majority of individuals of different species of the same genus or family usually fly on different days. The population is dominated numerically by the Arctic Warbler, the Common Redpoll, and the Little Bunting.