“…At the same time, there is evidence of various hazards for this species from poisoning by heavy metals and chlorinated hydrocarbons (Iwata et al, 2000;Kurosawa, 2000;Nakagawa, 2011), depletion of food resources (Lobkov, 2002), forest fires (Burenina, 2007), climate change (Potapov et al, 2012), predation by Ursus arctos (Linnaeus, 1758) (hereinafter -brown bear) (Romanov & Masterov, 2020a) as well as disturbance at nest sites, direct persecution, habitat alteration and other anthropogenic changes. There are already some warning signs of possible population decline, such as low productivity (Potapov et al, 2010(Potapov et al, , 2012 and a decrease in the proportion of immature birds in the population (Potapov et al, 2000;Masterov & Romanov, 2014), the suggestion being supported by the results of matrix population modelling (Romanov & Masterov, 2020b). Therefore, a thorough assessment of the global population is required.…”