Soil temperatures of the coldest month to the east of range of the Pallas’ spadefoot. Average soil temperatures of the coldest month at a depth of 160 cm in the eastern part of the geographic range of the Pallas’ spadefoot (shaded). Numbers represent temperature (°C); wide blue line – isotherm (0 °C). Rectangles with letters – the territories with the easternmost points of spadefoot’s finding (excluding enclaves). Names and coordinates of these points – in (Suppl. material 1: Table S1).