Yellowstone National Park caught at least 550 wild bison and killed 442 of them in order to implement population control in the nature reserve. This measure agreed on by the state and federal authorities is done to hinder the spread of animal diseases to cattle, such as brucellosis. The latter a poses serious danger to cows. According to official information, at least 822 of the park's 4,900 bison have been killed or removed.
The news comes after wildlife activists filed a lawsuit in a federal court in Washington DC last week, claiming that Yellowstone bison must be protected under the Endangered Species Act. The US Fish and Wildlife Service, however, has previously rejected the calls to stop the population control of the animals.