"Native American tribes said on Friday they oppose U.S. government plans to strip grizzly bears in the Yellowstone National Park area of federal safeguards, ultimately opening the way for sport hunting of them in northern Rocky Mountain states."

"Nevada's Lake Mead, the largest capacity reservoir in the United States, is on track to drop to its lowest water level in recorded history on Sunday as its source, the Colorado River, suffers from 14 years of severe drought, experts said on Friday."

"Montana has closed the hunting season on a wild herd of bighorn sheep, with pneumonia suspected of killing dozens of the animals whose seasonal mating rituals attract scores of wildlife watchers."

"The Bureau of Land Management has not asked the Justice Department to prosecute Nevada rancher Cliven Bundy or anyone else involved in an armed standoff last year with BLM officials who were attempting to round up cattle that were illegally grazing on federal lands, according to documents a government watchdog group sued to obtain."

"Wildlife advocates are suing the Obama administration to prevent the killing of protected grizzly bears that come into conflict with sportsmen over elk they kill or wound during annual hunts in northwest Wyoming."

"Fort Collins, Colo., led by a Republican mayor, approves targets to reduce emissions and become carbon neutral by 2050, but hurdles remain."

"An unprecedented attempt to protect sage grouse habitat across parts of more than 900 square miles of privately owned land in Nevada began under a deal Thursday involving the federal government, an environmental group and the world's largest gold mining company."

"A federal judge has granted two animal protection groups a unusual preliminary injunction to stop the Bureau of Land Management’s roundup of more than 330 wild horses in northern Nevada, saying the government cannot rely on a five-year-old environmental analysis that ignores claims the herd would be harmed by a pesticide given as a form of birth control."