Too many buffalo in the Grand Canyon are spoiling the environment. The U.S. Park Service is seeking hunters to thin a herd of buffalo in the famous gorge. About 600 bison live in the canyon area.
Experts tell the "BBC" that number could expand to 15-hundred in a decade if the buffalo numbers are not controlled. Environmentalists say they are stampeding over vegetation, causing soil erosion and contaminating water sources.
The bison are owned by the state of Arizona. They're descendants from animals brought to the area in the 1900s.