On August 25, photographer Paul Donahue received a call alerting him a large male jaguar had been spotted prowling along the Tres Irmãos River in central Brazil.
"We had seen kills before, but nothing so spectacular and horrific nor at such close range," Donahue told National Geographic. "It's made me think a lot about the fragility of life and the fine line between life and death."
Donahue reports the animal used its right front paw to grab the caiman before biting the reptile's back slightly below the head. Quickly adjusting his bite, the jaguar bit into the base of the caiman's skull and dragged his kill across the inlet.
A female jaguar walked down to the Three Brothers River in Brazil's Pantanal to drink. As she was resting, a male jaguar approached her only to encounter the enraged female who growled and charged her suitor. The pair quickly reconciled and disappeared into the jungle but only after photographer Joe McDonald was lucky enough to snap a shot of the spat for the Wildlife Photographer of the Year competition.
Bat got your tongue? A park ranger in northwest Peru was shocked when he came across a toad with a live bat in his mouth.
However, the toad eventually gave up and and let the bat go.
For the first time ever, a boa constrictor attacked and devoured a howler monkey. The attack is an example of an extremely rare case of a primate being eaten by a predator.
Two nearly complete dinosaur skeletons were found locked in mortal combat in Garfield County, Montana. The specimens are expected to fetch between $7 and 9 million dollars at Bonhams Auction House on November 2013.
A hippopotamus left no room for his message to get lost in translation when he ferociously defended his territory from an African elephant.
"There is an island on the middle of the Chobe River to which this elephant had crossed," photographer Nicole Cambre who captured the scene while visiting Botswana told National Geographic. "The hippo was not happy about it and was apparently defending its territory."
Cambre watched the scene unfold as the hippopotamus swam towards the elephant near the shoreline. The hippo approached the elephant and gave him an up close view of his massive teeth.
When the hippo came face to face with the largest land animal on Earth, he did not back down. He only reconsidered once the elephants' posse arrived.
While hippopotamus' are often called the most dangerous animal in Africa, the elephants were confident that their sheer size would be enough to ward off the hippo.
A seemingly unlikely battle between a golden eagle and a baby deer was photographed by a camera trap set up to capture poachers seeking Russia’s endangered tigers.
The three images captured by the camera cover a 2-second period, and show an adult golden eagle clinging to the deer's back. Its carcass was found two weeks later, just a few yards from the camera, initially puzzling researchers.
A mountain lion was caught on camera straddling a deer it had just killed on a highway in the mountains of Santa Monica, California.
The U.S. Department of Interior tweeted the picture of the deadly encounter which was taken on a remote part of the Mulholland Highway.
A chicken stuffed inside a duck stuffed inside a turkey is called a "tuducken." But what is the word for a bait fish stuffed inside a dogfish shark, stuffed inside a sand tiger shark?
University of Delaware shark scientists faced that question after they discovered the shark who swallowed the shark who swallowed the fish.
In the animal kingdom, it's every animal for himself. Nature's creatures sometimes loose their tempers and go in for the attack. From angry jaguars to sharks eating sharks and even eagles taking down deer, here are some of the most ferocious animal attacks.