ナショナルジオグラフィックのインスタグラム(natgeo) - 4月10日 22時28分

Photo by David Guttenfelder @dguttenfelder

A Yellowstone bison, kept temporarily at Montana’s Flying D ranch, is held in a livestock chute so it can be inoculated and retested for signs of the disease brucellosis.
The main obstacle to allowing Yellowstone bison to migrate freely in and out of Yellowstone National Park, as they would do naturally, is that about half exhibit evidence of infection with brucellosis, a serious bacterial disease that can cause pregnant cows to abort their calves. Cattle ranchers in Montana worry that their own herds, now disease free, could become infected if they mixed with Yellowstone bison on public grazing lands. The irony is that bison originally contracted brucellosis from domestic cattle—but there is no documented case of Yellowstone bison directly transmitting the disease back to livestock.

Please check out National Geographic's project on Yellowstone to coincide with the 100 year anniversary of the creation of the U.S. Park Service.
Members of the Nat Geo photo team include - @dguttenfelder @chamiltonjames @michaelnicknichols @erikalarsen888 @ronan_donovan @shannon_sanders @joeriis @e.l.johns @Cory Richards

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