This week: "Elvis" woodpecker sighted, anti-terrorist fish guard cities, mystery of fingerprintless people solved, python eats pregnant sheep, and more.

It hasn't yet reached biblical proportions, but the plague of locusts currently infesting the resort town of Cancún has some residents looking to the heavens for help.

Efforts to protect manatees in the coastal waters of Belize stand to benefit the global conservation of the huge, sluggish marine mammals, a scientist says.

Four amateur explorers have discovered a mammoth cave in California's Sequoia National Park that scientists are hailing as a major find.

Scale to new heights with this year's winners of the Banff Mountain Photography Competition, and get the photographers' tips for how they created the award-worthy shots.

Get a sneak peek at selected photos of United States rivers, and learn more about the country's vital waterways.

Crocodile meat, lilly pillies, and other wild foods are leaving the bush for Australian supermarkets, creating business opportunities for Aboriginal communities.

Go behind the scenes as conservationists release a captive-bred giant panda into China's bamboo-covered mountains for the first time.

Hear an Everest guide describe the rescue of an ailing climber who had been left for dead and was found hallucinating on a narrow ridge at 28,000 feet (8,534 meters).

Huge hordes of jellyfish are plaguing Mediterranean beaches, stinging tens of thousands of vacationers. Experts blame the invasion on warming seas and overfishing of the jellies' competitors.

Boaters on the Suwannee River are having close encounters with curious creatures—giant Gulf sturgeon that leap out of the water for reasons scientists don't understand.

Watch as a lone male bird tries to steal a meal from another family's turf and winds up locked with another male in a whirling dive bomb.

Take a trip down the Orinoco, and get an inside look at the diversity of life sustained by this vital and vibrant river.

Watch one of Alaska's famous rites of summer, as sockeye salmon face hungry bears and steep falls to mate in the upstream waters where they were born.

Thousands of snakes are shipped by air every week in the U.S. We ask the experts how they keep this creepy cargo from re-creating the mayhem of the new movie Snakes on a Plane.