Animal Quick Links Find animals by type. (ad) Buy the Almanac! Get your hands on a copy. Watch on YouTube! Play all the videos! Mammals Get facts, videos, and photos. Watch on Roku! Play all the videos! Is your dog a genius? More Watch Nat Geo Kids on Saturday mornings! Get a sneak peek of the great shows we've got lined up for you. African Elephant LARGE AND IN CHARGE Cheetah Fastest land mammal Lion SAVANNA KING Black RHINO They're endangered. GRAY WOLF These wild dogs like to play! MOUNTAIN GORILLA They eat a lot! BLUE WHALE THE EARTH'S LARGEST ANIMAL HIPPOPOTAMUS BORN UNDERWATER! Polar Bear They're strong swimmers. Bottlenose Dolphin They communicate with clicks. KANGAROO CAN LEAP 30 FEET! Raccoon They really love garbage. Research Reptiles! Get facts and watch videos about these cold-blooded creatures. GILA MONSTER EATS ONCE A YEAR! NILE CROCODILE ARMORED TANK King Cobra A snake with bite! BOA CONSTRICTOR SQUEEZE PREY Hairy Frogfish Spines help this fish hide. Stingray Their tails have venom! Red-Bellied Piranha Mean—or just misunderstood? Seahorse LOOKS LIKE A TINY HORSE! Find out about Fish! Watch videos, see pictures, and get facts.