An agreement has been reached to allow the Arizona Game and Fish Commission to work with the National Park Service to cull the number of bison on the North Rim of Grand Canyon National Park.
In an effort to disrupt the "refuge effect" that allows the House Rock bison herd to grow where there is no pressure on them, the agreement includes a number of tools for herd reduction including live capture and translocations, hazing and lethal removal by skilled volunteers. Given the current distribution, abundance, density and the expected growth of this herd, the public and the Park Service are concerned about increased impacts on park resources such as water, vegetation, soils, archaeological sites and values such as visitor experience and wilderness character.
https://www.nationalparkstraveler.org/2020/10/arizona-wildlife-authorities-reach-agreement-cull-bison-grand-canyon-national-park