Vipers living in the Center currently spend winter hibernated in artificial burrows. Snakes are in a state of almost complete immobility; during brumation their metabolism slows significantly, their body temperature drops to 4°C. Every year in the middle of the winter, we use a special videoscope to inspect the burrows of the snakes and check the condition of the animals. In one of the burrows, a green lizard spends the winter together with the snakes.
