Mighty bison were on the verge of going extinct in the early 20th century.
However, scientists managed to revive the species. Poland gave 10 bison to Białowieża Forest in 1946. The bison population has increased with the course of time. Belarus has nine bison populations in Volozhinsky experimental timber enterprise, Osipovichesky experimental forest holding, Pripyat National Park, and Polesye state Radiation-ecological Reserve.
Some bison were brought from Białowieża Forest to Republican landscape reserve Naliboksky in 1994. The animals settled and have been doing well since then. The bison is saved from extinction, but not from the threat of being extinct. They get round-the-clock protection. The bison derived from 14 animals. This is illustrative of consanguineous mating. So, genetic material is rather poor.
That is the reason why the scientists exchange bison with other countries, such as Russia and Kazakhstan. Besides, the bison are resettled from Bialowieza Forest to other parts of Belarus
The migration aims to preserve the species in the long range.