A herd of about 650 of these animals lives in, and can be seen at, the Wichita Mountains Wildlife Refuge near Lawton, Oklahoma. The herd was started in 1907 with stock from the New York Zoological Park, now known as the Bronx Zoo and located in the Bronx Park. Fifteen animals were shipped to Oklahoma, where bison had already become extinct due to excessive hunting and overharvesting by non-native commercial buffalo hunters from 1874 to 1878. Some of these specimens have been released in other areas of the United States, such as Paynes Prairie in Florida.