"HARARE, Zimbabwe -- Zimbabwean authorities say at least 81 elephants have been killed for their ivory tusks by poachers using cyanide poison in water holes in a vast western national park."

"Wildlife managers in Montana are trying to pinpoint whether a disease, environmental toxin or chemical agent has caused a die-off of more than 100 whitetail deer in wetlands along a river corridor in the western part of the state."

"SAN FRANCISCO — In the coastal redwood forests of central California, scientists trying to unravel the mystery surrounding the reproductive problems of dozens of endangered condors think they have uncovered the culprit: the long-banned pesticide DDT."

"Jeremy Coleman was on the trail of a ruthless serial killer, recently studying its behavior, patterns and moves at a Massachusetts lab. The more he saw, the more it confirmed a hunch. He had seen it all before. He was looking at a copycat."

"Encounters between bears and humans are likely to increase in Yellowstone National Park this fall as a scarce supply of nuts forces hungry grizzlies to seek food closer to the U.S. park's popular tourist areas, officials warned on Wednesday."

"The death threat itself didn’t bother Mike Ehlebracht. He’d been threatened plenty of times before."

"The United States will destroy its six-ton stockpile of elephant ivory as a way to combat wildlife trafficking, an international fight that often has law enforcement outgunned by well-financed crime syndicates, White House panelists said on Monday."

"The ivory - raw and carved whole tusks and smaller items seized by or abandoned to U.S. agents over the last 25 years - will be crushed as part of a push to publicize the illegal trade that threatens wild elephants, rhinoceros, tigers, great apes and other iconic species, said Interior Secretary Sally Jewell.

"'It's a jungle if you're an eagle right now on the Chesapeake Bay,' says Bryan Watts, a conservation biologist at the College of William and Mary in Williamsburg, Va. 'You have to watch your back.'"

"SAN FRANCISCO -- The use of pesticides and the planting of genetically engineered crops on U.S. national wildlife refuges are illegal and damaging to the environment, say four advocacy groups who have filed a federal lawsuit to halt these practices on national wildlife refuges across the Midwest."