Robert Magnan

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This Feb. 5, 2017 provided by Robert Magnan shows the boundary of a 320-acre animal quarantine on Montana's Fort Peck Reservation that is not being used because of a dispute between the tribes and state livestock officials. Yellowstone National Park has started shipping hundreds of wild bison to slaughter for disease control as a quarantine facility that could help spare many of the animals sits empty because of a political dispute. Park officials said 15 bison originally slated for the quarantine on the Fort Peck Reservation were instead loaded onto trailers Wednesday, Feb. 8 and sent to slaughter. Hundreds more will be shipped in coming days. Transferring bison to the quarantine is opposed by Montana officials. (Robert Magnan via AP)