Tabachishin V. G. RussiaSaratovSaratov branch of A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 24 Rabochaya Str., Saratov 410028, RussiaTabachishinvg@sevin.ru Author's articles Ecological peculiarities of the nesting and reproduction of Haematopus ostralegus longipes Buturlin, 1910 (Haematopodidae, Charadriiformes) in the course of the Medveditsa river (Saratov region)