Biotopic distribution of amphibians (Amphibia) in the Middle Volga region

Data on the biotopic distribution of amphibians and an analysis of the species composition of amphibians in their typical habitats are presented. 10 open terrestrial (meadow, steppe, arable land), 10 closed terrestrial (woodlands) and 10 drive (reservoirs) biotopes, as well as 10 ecotones of forest and open biotopes were studied. The specific distribution of individual species has been established depending on environmental factors, including the level of acidity (pH) of spawning ponds. The characterization of the distribution of population systems of green frogs, as well as the "eastern" and the "western" cryptic forms of the European green tods, marsh frog is given.