Wild animals do not recognize park borders. Two of Yellowstone’s iconic species, bison and elk, spill seasonally—and naturally—beyond park boundaries looking for food. One is welcome.
For 17 years Rick Wallen was the team leader of Yellowstone National Park’s bison ecology program. He retired six years ago ...
At one point, she turns her back to the bull elk, and that was one of many questionable mistakes she made that day. Just as ...
Among those bison who field-tested positive for brucellosis and were killed between 1996 and 1999, 80 percent later tested negative for the disease in more reliable lab tests. Thousands of elk in ...