The animal kingdom is stranger, cleverer and funnier than any cartoon. Some creatures see colors we can't imagine, some build homes that breathe, and at least one makes square poop. Every fact on this page lines up with what scientists actually know, so you can share them at dinner, in class or on a long car ride without worrying that you're spreading a tall tale.
Read through all 60, then put your memory to the test with our animal trivia quiz. If sea creatures are your favorite, the ocean fun facts page is waiting for you next.
Marvellous Mammals
- Koalas have fingerprints a lot like ours. Under a microscope, koala fingerprints look so similar to human prints that even experts can struggle to tell them apart. The ridges probably help koalas grip branches and feel the leaves they eat.
- Wombats make cube-shaped poop. The walls of a wombat's intestine stretch unevenly, slowly shaping its droppings into little cubes. Wombats leave them on rocks and logs to mark their territory, and the flat sides stop them from rolling away.
- A giraffe's neck has just seven bones. That's the same number of neck bones that humans have. Each giraffe vertebra is simply enormous, and a single one can be about 25 centimeters long.
- Polar bears have black skin. Their fur isn't truly white either: each hair is see-through and only looks white because it scatters light, the same way snow does. The dark skin underneath helps soak up warmth.
- Platypuses lay eggs. The platypus and the echidnas are the only mammals that lay eggs instead of giving birth to live young. A platypus can also sense the tiny electrical signals made by its prey, using its rubbery bill.
- Bats are the only mammals that can truly fly. Flying squirrels can only glide, but bats flap their way through the air. A bat's wing is really a hand, with long finger bones covered by a thin layer of skin.
- A cow has one stomach with four compartments. People often say cows have four stomachs, but it's really one stomach divided into four chambers. Together they let a cow break down tough grass that most animals can't digest.
- A rodent's front teeth never stop growing. Squirrels, mice and beavers must keep gnawing to wear their front teeth down. Beaver teeth even look orange because their enamel contains iron, which makes it extra tough.
- Cheetahs can't roar, but they can purr. Instead of roaring like lions, cheetahs purr, chirp and make bird-like yelps to talk to each other.
- Hippos make their own sunscreen. Hippos ooze a reddish-orange liquid often nicknamed "blood sweat," even though it's neither blood nor sweat. Scientists found that it helps block sunlight and may protect against germs.
Brilliant Birds
- Hummingbirds can fly backward. By twisting their wings in a figure-eight motion, hummingbirds can hover in place, zip sideways and even reverse away from a flower.
- An ostrich's eye is bigger than its brain. Each eye is about five centimeters across, giving ostriches excellent eyesight for spotting danger across open plains.
- Owls can't move their eyes. An owl's eyes are shaped more like tubes than balls, so they're locked in place. To look around, owls turn their super-flexible necks, up to about 270 degrees.
- Flamingos are pink because of what they eat. The algae and tiny shrimp in their diet contain natural pigments called carotenoids. A flamingo that eats less of that food slowly turns paler.
- Some birds sleep with half their brain awake. Ducks resting at the edge of a group can keep one eye open and one side of the brain alert, watching for predators while the other side rests.
- Crows can remember human faces. In studies, crows recognized people who had bothered them and scolded them years later. They even taught other crows to scold the same people.
- A woodpecker's tongue wraps around its skull. The tongue is anchored by long, flexible bones that curl around the back of the head, letting woodpeckers reach deep into holes to grab insects.
- Arctic terns enjoy two summers every year. These seabirds fly from the Arctic to the Antarctic and back again each year, a round trip of tens of thousands of kilometers.
- Peregrine falcons are among the fastest animals on Earth. In a hunting dive called a stoop, a peregrine can reach speeds of more than 300 km/h.
- Lyrebirds can copy almost any sound. These Australian birds weave other birds' songs into their own, and some have been recorded imitating camera clicks and car alarms.
Incredible Insects and Spiders
- Butterflies taste with their feet. Sensors on their feet tell a butterfly whether a leaf is the right plant for its eggs, just by standing on it.
- Honeybees dance to give directions. A bee returning to the hive performs a "waggle dance" whose angle and length tell other bees which way to fly and how far to go to find flowers.
- Bees have five eyes. Two big compound eyes see shapes and movement, while three tiny eyes on top of the head help sense light.
- Insects don't have lungs. They breathe through tiny holes along their bodies called spiracles, which lead into a network of air tubes.
- Spider silk can be stronger than steel of the same weight. Some silks are stretchy too, which lets a web catch fast-flying insects without snapping.
- Fireflies make "cold" light. The chemical reaction that makes a firefly glow gives off very little heat, unlike an old-fashioned light bulb. Many species flash in their own special pattern to find a mate.
- Dragonflies have up to about 30,000 lenses in each eye. Their huge eyes give them nearly all-around vision, and they can fly forward, backward, sideways or hover in place.
- A cricket's ears are on its front legs. Tiny drum-like patches just below the knees pick up the chirps of other crickets.
- Monarch butterfly migration takes several generations. Monarchs from eastern North America fly thousands of kilometers to spend the winter in Mexico, and no single butterfly makes the whole round trip.
- Only female mosquitoes bite. Both males and females sip plant nectar, but females need a meal of blood to make their eggs.
Remarkable Reptiles and Amphibians
- Wood frogs can freeze solid and survive. In winter, a wood frog's heart stops and ice forms inside its body, while special sugars protect its cells. When spring arrives, it thaws out and hops away.
- Chameleons change color mostly to communicate. Tiny crystals in their skin reflect light differently as they shift. Color changes signal mood, warn rivals and help control body temperature, not just help them hide.
- A turtle can't climb out of its shell. The shell is part of its skeleton, built from the turtle's own ribs and backbone fused together.
- Nest temperature decides whether many baby turtles are boys or girls. In many turtle species, warmer nests produce more females and cooler nests produce more males.
- Snakes smell with their tongues. A flicking tongue collects scent particles from the air and delivers them to a special sensing organ in the roof of the mouth.
- Geckos can walk across ceilings. Their toes are covered in millions of microscopic hairs that cling to surfaces using tiny attractive forces between molecules.
- Axolotls can regrow lost body parts. These Mexican salamanders can rebuild legs, tails and even parts of their heart and spinal cord.
- Some lizards can drop their tails to escape. The wriggling tail distracts a predator while the lizard dashes away, and many species slowly grow a new one.
- Pit vipers can sense heat. Small pits on their faces detect infrared warmth, so they can find warm-blooded animals even in total darkness.
- Glass frogs have see-through bellies. Look at one from underneath and you can watch its heart beating inside.
Super Senses and Survival Skills
- Mantis shrimp pack one of the fastest punches in nature. Their club-like limbs strike quickly enough to crack snail shells, and their eyes have far more types of color receptors than ours.
- Elephants can feel rumbles through their feet. Elephants make deep, low calls that travel through the ground, and they can pick up those vibrations with their sensitive feet and trunks.
- The star-nosed mole has an amazing nose. The 22 pink tentacles around its snout are packed with touch sensors, helping it find and gobble food in a fraction of a second.
- Sharks can sense electricity. Jelly-filled pores on a shark's snout detect the faint electrical signals made by the muscles of other animals.
- A dog's nose print is one of a kind. Just like human fingerprints, the pattern of ridges and bumps on a dog's nose is different for every dog.
- Cats can't taste sweetness. Cats lack a working version of the gene for detecting sweet flavors, which makes sense for animals that mostly eat meat.
- Octopuses have three hearts and blue blood. Two hearts pump blood through the gills and one pumps it around the body. Their blood uses copper instead of iron to carry oxygen, which gives it a blue tint.
- Camel humps store fat, not water. The fat is an energy reserve. Camels survive long dry spells because their bodies are extremely good at saving water.
- Snow leopards use their tails as scarves. Their long, fluffy tails help them balance on steep slopes and can be wrapped around their faces to keep warm.
- Tardigrades can survive a trip to space. These tiny "water bears" can dry out into a tough little ball and survive freezing cold, crushing pressure and even exposure to outer space.
Family, Friends and Homes
- Seahorse dads give birth. The female places her eggs in a pouch on the male's belly, and he carries them until the tiny babies swim out.
- Emperor penguin fathers balance the egg on their feet. For about two months of freezing Antarctic winter, the dad keeps the egg warm under a feathery fold of skin while the mom goes to sea to feed.
- A newborn kangaroo is about the size of a jellybean. The tiny joey is born after only about a month, then crawls into its mother's pouch, where it keeps growing for months.
- Sea otters sometimes hold paws while they nap. Floating otters may link paws or wrap themselves in kelp so they don't drift away from their group.
- Bottlenose dolphins have names. Each dolphin develops its own "signature whistle," and other dolphins can copy that whistle to call a specific friend.
- Elephant families are led by the oldest female. A herd is usually guided by an experienced matriarch, whose memory of water holes and safe routes helps the whole family.
- Meerkats take turns standing guard. While the group digs for food, one meerkat keeps watch from a high spot and gives an alarm call if danger appears.
- Leafcutter ants are farmers. They don't eat the leaves they carry. Instead they use them to grow a special fungus in underground gardens, and the fungus becomes their food.
- Termite mounds are built to breathe. Tunnels and chimneys inside the mound help air flow through it, and architects have studied them while designing buildings that stay cool with less energy.
- Animal groups have wonderful names. A group of flamingos is called a flamboyance, and a group of owls is called a parliament.
Myths we left out
Some animal "facts" get shared so often that people assume they're true. These popular ones didn't make the cut: - Myth: Goldfish have a three-second memory. Reality: Experiments show goldfish can learn tasks and remember them for weeks or even months. - Myth: Bulls get angry when they see red. Reality: Bulls can't really tell red from green; it's the movement of the cape that grabs their attention. - Myth: Ostriches bury their heads in the sand. Reality: Ostriches dig shallow nests in the ground and lower their heads to turn their eggs, which may be how the story started. - Myth: Bats are blind. Reality: All bats can see, and many have good eyesight. Lots of species also use echolocation to hunt in the dark.
Frequently asked questions
What is the fastest animal on Earth?
In a dive, the peregrine falcon is usually considered the fastest animal, reaching more than 300 km/h. On land, the cheetah is the fastest runner over short sprints.
Are these animal facts suitable for kids?
Yes. Every fact on this page is family-friendly and written for curious readers of all ages, which makes it handy for classrooms, homeschool lessons and road trips. For a quick brain workout every day, try our daily challenges.
Why do some animals have blue blood?
Animals such as octopuses and horseshoe crabs carry oxygen with a copper-based substance instead of the iron-based one in our blood. When that copper-based substance picks up oxygen, it turns blue.
Where can I find more fun facts?
Keep exploring with our random fun facts, or see how much you know across every subject on our trivia quizzes page.