Клоктун Sibirionetta formosa в тундре Западной Чукотки: гнездование, динамика встречаемости и современное распространение

The Baikal Teal, Russia's nesting endemic, is listed in the Red Book of the Russian Federation as a declining species.The Baikal Teal has always been rare in Chukotka Autonomous Okrug; therefore, its abundance fluctuations in this area have never been documented, and, historically, its nesting has been recorded there just once. According to aerial surveys, the Baikal Teal average density in Western Chukotka's tundras was 0.08 individuals / km2 in 2021. Birds of this species were recorded everywhere: on the Kyttyk Peninsula and Aion Island, in the Chaun-Pucheveem delta, in the Pegtymel River delta, and in the Apapelgino settlement precincts. Nesting of this species in the Chaun - Pucheveem River delta has been proved.