areas, along the Meuse in Limburg, and in the Gelderse Poort and Oostvaardersplassen. In 2012, the population was estimated to be about 600 animals and could easily grow to 7000 in 20 years' time. According to the Mammal Society and the Dutch Water Board, this will cause a threat to the river dikes. The main problem is that beavers excavate corridors and caves in dikes, thereby undermining the stability of the dike, just as the muskrat and the coypu do. If problems become unmanageable, as local administrators in Limburg fear, the beaver will be captured again. As of 2014, the beaver population in Poland reached 100,000 individuals. and was still growing. After major flooding in Poland in May and June 2010, the local authorities of Konin in central Poland held beavers responsible for causing the flooding and demanded the culling of 150 beavers. In Romania, beavers became extinct in 1824, but were reintroduced in 1998 along the Olt River, spreading to other rivers in Covasna County. In 2014, the animals were confirmed to have reached the Danube Delta. By 1917, beavers remained in Russia in 4 isolated territories: in the Dnieper basin; in the Don basin along the tributaries of the Voronezh; in the northern Urals and in the upper reaches of the Yenisei along the Azas River. The total number of beavers did not exceed 800-900 heads. Since 1922, hunting them has been universally prohibited. In 1923, a hunting reserve was organized in the Voronezh region along the Usman River, which in 1927 was transformed into the Voronezh State Reserve. At the same time, two more reserves were created: Berezinsky and Kondo-Sosvinsky. Their main task was to protect the beavers and restore their numbers. Since 1927, the first attempts to resettle beavers began. As a result of the measures taken, by the end of the 1960s, the beaver in the USSR settled in an area almost equal in area to the range of the 17th century. The increased number of beavers made it possible to organize their commercial capture again. In 2016, there were 661,000 beavers in Russia. In 2019, the population of these animals amounted to 774.6 thousand individuals. In the former Soviet Union, almost 17,000 beavers were translocated from 1927 to 2004, of which 12,000 were to Russia, and the remainder to Ukraine, Belarus, the Baltic States, and Kazakhstan. The beaver is now common in Estonia and