The nesting of the Chinese bush warbler (Tribura tacsanowskia, Sylviidae, Passeriformes) in the Amur region
A nest of the Chinese bush warbler (Tribura tacsanowskia) has been found and monitored in the Amur region for the first time. This is a poorly-studied species distributed in southeastern Siberia, the Russian Far East, and the adjoining areas of Mongolia and China. Only seven nests of this species were found earlier, all of them in Transbaikalia. Descriptions of those findings are given, including the habitat, the location and structure of nests, the egg clutch and downy chick, the behavior of adult birds at their nest. The time contributions of the male and female spent in per cent in the nest, as well as to chick feeding and the ejection of chicks’ litter pellets have been calculated for the first time. The main parameters of nesting life have been revealed: daytime and nocturnal activity cycles of adult birds in the nest, and daily graphs of nestling feeding hours. Observations of adult activity at the nesting site in the period of feeding the nestlings in and after their release from the nest, as well as some other details of Chinese bush warbler behavior and nesting are presented.