Greater Yellowstone Ecosystem

Critics of wolf reintroduction in the Mountain West say the canine is the biggest threat to elk, but a new study says that’s not necessarily true.

Zebra and quagga mussels can devastate an ecosystem, and Yellowstone National Park is doing everything it can to keep them out. Most recently, that...

A group of wildlife advocates is suing the federal government, saying they need to have more of a role in helping to prevent grizzly bear deaths on...

A coalition of conservationists is petitioning Idaho and Wyoming to make hunters carry bear spray when they’re within the Yellowstone ecosystem.

Eleven grizzly bears in the Greater Yellowstone ecosystem have been euthanized since the beginning of September in a "particularly bad month" for grizzly…