Tabachishin V. G. RussiaSaratovSaratov branch of A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 24 Rabochaya Str., Saratov 410028Tabachishinvg@sevin.ru Author's articles PHENOLOGICAL CHANGES OF THE WINTERING OF PELOBATES FUSCUS (PELOBATIDAE, AMPHIBIA) IN THE CLIMATE TRANSFORMATION CONDITIONS OF THE NORTHERN LOWER-VOLGA REGION