Annotated list of birds of the Sayan mountain system: structure, number, nature of presence and placing

Based on the analysis of literary sources and original materials of the author's studies of many years, the annotated list of birds of the Sayan mountain system was formed for the first time. It includes the data on the nature of presence, the number, the landscape and biotopical placing of 245 species (254 subspecies) of birds, including the data on the West Sayan - 243 species (253 subspecies) and the data on the East Sayan - 216 species (226 subspecies).