A unique object of wildlife.
Scopa Eurasian (Pandion haliaetus L.) - a rare species, which declines in numbers. In the Tver region. the population of the species is estimated at about 30-40 breeding pairs.
Since 1986, in the vicinity of Lake Sonino, there are several pairs of nesting here in the Osprey. To preserve the local natural balance in the ecosystem of the forest-lake-marsh complex, it was decided to take this place under environmental protection, endowing it with the status "Nature Monument".