A closer look at the issues involving these 24 monuments established by three former presidents over more than two decades.
National Park Service
With decline of wolves, moose population explodes on Isle Royale National Park. But the fear is many of those moose could starve to death.
Study: With few wolves, Isle Royale moose population growing out of control; restored predator-prey balance needed
The worry is that, without a predator like wolves, moose numbers will continue to skyrocket and the animals will decimate the forest on the island — and with fast-growing numbers, that a good many of them will starve to death.
A national debate about the predator-killing M-44 device is unfolding in the wake of a hospitalized teenager and three dogs and a wolf that have been killed recently in Wyoming, Idaho and Oregon.
Federal ban pertains to certain hunting techniques in national refuges and preserves.
The National Park Service and the U.S. Fish and Wildlife Service are considering four options, including taking no action.
For more than a decade, biologists from the U.S. Fish and Wildlife Service have moved hundreds of humpback chub each fall about five miles upriver, where there are fewer predators and more food for the fish.
Plan offers 4 options for restoring animals in the state
Would overturn a ban on certain hunting techniques on national refuges and preserves
National Park Service is considering four options for the remote Michigan park — two that would include adding wolves, one that could eventually mean more wolves and one that would let nature take its course.
National Park Service is considering four alternatives — two that would include relocating wolves to Isle Royale, and two that would mean doing nothing, basically letting nature take its course regarding the dwindling wolf population at the park.