Don't doze off just yet. Maybe they should be called bed blood bugs — an army of these can attack a person 500 times in one night!
This species of whale has an unusual and mysterious tusk, once harvested and sold as a unicorn horn for 10 times its weight in gold.
Think you can guess who wins the day when two aggressive predators compete for the same prey?
The small water chevrotain has some big distant cousins, but it must rely on instinct when a crowned eagle decides it would make tasty prey.
They say it takes two to tango and three's a crowd. The clichés apply even in the the world of an octopus.
Mama Bear teaches her cubs how to fish in the same place she learned when she was a wee grizzly.
You can't call them lazy. Once a female rat reproduces, she could have 15,000 descendants by the end of just one year!
It's one big happy family for wild painted dogs after new pups are born — as long as everyone follows the rules of the one main mom.
Crocodiles in the southern African country of Malawi often eat more than just regular wildlife prey. Sometimes they attack humans who get in their way.
Hungry baboons in Kenya's Lake Bogoria find themselves surrounded by a million unsuspecting — and unprotected — flamingos.
You want zombies? A scary movie? These beetles can trump most Hollywood horror films anytime!
Stunning video of a boa constrictor killing and then eating an iguana. It all happened in the Costa Rican backyard of National Geographic Explorer Susan Perry.
The short-tail shrew is the only North American mammal with a poisonous bite. That's a cool fact, but too bad for an unfortunate snake...
Now this is strange, even scary: ants controlled by parasites, all because they ate the slime of a snail!
Sometimes coming up for air might not be such a good idea — especially if there's a hungry polar bear prowling about.
Not the King of the Jungle - but for ants, these creatures might well be. What lurks in the soft blanket of sand?
They might kill snakes, but what happens when a pack of mongooses encountersthe largest stork in the world?
What's the best way to staty safe when a gorilla is charging at you?
In the African rain forests of Congo, conservationist Mike Fay is charged by a 3-ton elephant. What does Mike do to keep himself out of harm's way?
The venomous Goliath Tarantula is the largest spider in the world. What should you do if one lands on you?
A dingo spots a young kangaroo, and the hunt is on.
What happens if you're a mouse, high in a tree, threatened by a huge boa constrictor? Make the jump of your life!
Mormon crickets create a creepy scene and even dangerous driving conditions in the American West from early spring through the summer.
Just one day after being born, wood duck hatchlings must take a frightening leap of faith to reach their mother.
Meerkats take on a dangerous puff adder that encroaches on their territory. Does the mob rule, or does the snake eat tonight?