Oparin M. L. RussiaSaratovSaratov branch of A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 24 Rabochaya Str., Saratov 410028, Russiaoparinml@mail.ru Author's articles ABUNDANCE OF TETRAX TETRAX L. 1758 (OTIDIDAE, AVES) IN THE SARATOV REGION