In Yellowstone National Park: Plan could cut 360 bison

Park biologists wrote in the proposal that reducing the population could avoid the need for the large-scale slaughters — more than 1,700 were killed or removed in 2008 — seen during past migrations. In harsh winters, bison leave the park in large numbers seeking food at lower elevations in Montana. 

State officials said hunting was their top choice for population control. However, Schweitzer said in an interview that for the strategy to work, the park must open its borders to hunting inside portions of Yellowstone where bison often congregate in winter. Past hunts yielded few bison during mild winters when the animals did not cross out of the park. 

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