Yellowstone National Park

Experts worry that as the gray wolf population just outside of Yellowstone National Park continues to grow, looser hunting restrictions in surrounding states could change pack behavior and hurt one of the most comprehensive research studies on the species anywhere in the world.

One of the largest cullings in a decade is planned for the bison herd at Yellowstone National Park, says Reuters. Plans call for animals that stray outside the park boundaries to be targets for hunters and for the animals to be herded to tribal land for slaughter.