Bull caribou grazing on the tundra with the Lisburne Production Facility in the background, Prudhoe Bay Oil Field, North Slope,  Arctic Alaska

July 20, 2012
Bull caribou walking on the tundra in the Prudhoe Bay Oil Field, North Slope,  Arctic Alaska

July 20, 2012
Bull caribou walking on the tundra in the Prudhoe Bay Oil Field, North Slope,  Arctic Alaska

July 20, 2012
Bull caribou grazing on the tundra in the Prudhoe Bay Oil Field, North Slope,  Arctic Alaska

July 20, 2012
Caribou standing along pipelines in the Prudhoe Bay Oil Field, North Slope, Arctic Alaska

June 23, 2012
Caribou grazing on the tundra with the Central Compression Plant (CCP) and a truck driving on the road in the Prudhoe Bay Oil Field, North Slope, Arctic Alaska

June 23, 2012
Caribou grazing on the tundra with the Central Gas Facility (CGF) and a truck driving on the road in the Prudhoe Bay Oil Field, North Slope, Arctic Alaska

June 23, 2012
Caribou standing along pipelines in the Prudhoe Bay Oil Field, North Slope, Arctic Alaska

June 23, 2012
Caribou grazing on the tundra with Pump Station 1 in the background, Prudhoe Bay Oil Field, North Slope, Arctic Alaska

June 21, 2012
Bull caribou grazing on the tundra with the Lisburne Production Facility in the background, Prudhoe Bay Oil Field, North Slope, Arctic Alaska

July 20, 2012
Bull caribou grazing on the tundra with the Lisburne Production Facility in the background, Prudhoe Bay Oil Field, North Slope,  Arctic Alaska

July 20, 2012
Bull caribou grazing on the tundra with the Lisburne Production Facility in the background, Prudhoe Bay Oil Field, North Slope, Arctic Alaska

July 20, 2012
See photo in original gallery.