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This 4-inch-long (10-centimeter-long) fish shares an amazing partnership with another sea creature: the anemone (pronounced: uh-NEM-uh-NEE). The partnership benefits both participants, and the close relationship led to the fish being named an anemonefish. Anemones have tentacles that sting, but the clownfish isn’t bothered by them. In fact, it lives among the tentacles. Living among the tentacles of the anemone, the clown anemonefish gains protection from predators—which don’t dare get near the stinging protector. The anemonefish also gets to eat leftovers from the anemone’s meals. The anemone benefits from having the fish around, too. The useful fish nibbles away parasites that bug the anemone. And sometimes the anemonefish brings food into the tentacles which the anemone can also eat. Generally several anemonefish make one host anemone their home.
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Co-what-i? You may not be familiar with this fur ball, which inhabits parts of South America, Central America, and North America. But you no doubt know about the mammal’s famous family. The coati is closely related to the raccoon. And like its cousin, this mammal is the size of a large house cat, has a ringed tail, and hangs out in trees. SNOOZE AND CHEWS Unlike the nocturnal raccoon, which is active at night, the coati mostly gets its z’s when it’s dark. These animals turn treetops into bedrooms, even building comfy twig-and-leaf nests in branches for their babies. As a coati sleeps, it tucks its nose into its belly. During the day, the coati is all about snacking. It uses its long, flexible nose to probe gaps between rocks and search under piles of leaves for grub. Coatis eat insects, fruit, rodents, lizards, and small snakes. MAKE SOME NOISE Female and baby coatis eat, sleep, and travel in packs of about 30. At age two, males leave to live on their own. In groups these animals are chatty—they click, grunt, whistle, and bark as they forage for food. So while it may not be as well known as its raccoon relatives, the coati definitely lets you know it’s there. Text by April Capochino Myers
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Black-tailed jackrabbits are not actually rabbits, but are hares. Hares are born with fur and are larger than rabbits. They usually have taller hind legs and longer ears. These speedy animals are capable of reaching 40 miles (64 kilometers) an hour. They have powerful hind legs that can propel them on leaps of more than 10 feet (3 meters) . They use these leaps and a zigzag running style to evade their many predators, including coyotes. Jackrabbits produce a lot of young called leverets or bunnies. Females give birth to several litters a year, each with one to six young. The young mature quickly and require little care from their mothers. While the endangered status of most species is least concern, the Tehuantepec jackrabbit is considered near threatened. Other species of jackrabbits live in Mexico, the United States, and Canada.
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Caribou are mammals that live in the northern regions of Europe, North America, Asia, and Greenland. When snow begins to fall, caribou move south and travel to more sheltered climes where they can feed on moss or lichens. These members of the deer family dig for food using their large hooves. The underside of each hoof is hollowed out like a big scoop and allows the caribou to dig through snow in search of food. Caribou trek north in the summer in one of the largest animal migrations on Earth. They travel more than 600 miles (965 kilometers) along well-traveled routes. They spend the summer feeding on grasses, mushrooms, and plants in the tundra. They begin to move south in the winter and over one year they will have migrated over 1,600 miles (2,574 kilometers). One adult caribou eats about 12 pounds (5 kilograms) of food each day. Caribou are hunted by indigenous northern people throughout much of their range. Woodland caribou are listed as endangered, but other caribou populations are stable.
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A red-bellied piranha calmly swishes through a river. Suddenly, it spots dinner: a shrimp swimming nearby. The fish glides closer and opens its mouth to reveal rows of razor-sharp, triangular teeth. Then it snaps up its prey in its powerful jaws and swallows the shrimp whole. Finished with its first course, the fish swims off in search of more food. ON THE HUNT Red-bellied piranhas live in lakes and rivers in South America. They sometimes use their mighty mouths to gobble up other fish or animals such as shrimp, worms, and mollusks. They swim and hunt in shoals, or schools, that can include more than a hundred individuals. According to legend, the animals, which can grow about 14 inches long, have even devoured human swimmers. MISUNDERSTOOD FISH Despite their big bite, scientists believe that the animals’ fearsome reputation has been exaggerated. Researchers think that these fish swim in groups for protection, not to carry out underwater takedowns . And reports of the fish going after humans are extremely rare. When some red-bellied piranhas do get aggressive, they have an interesting way of telling others to „back off“—they make bark-like sounds! Guess these guys are all bark, and just some bite. Text by April Capochino Myers
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A 40-pound mammal creeps along a tree branch in a steamy forest. The animal looks like a cross between a cat and a bear. And its appearance isn’t even its strangest quality. What’s even weirder is the creature’s smell: It gives off the scent of buttered popcorn! This is the binturong, an animal that’s full of surprises. GET A GRIP Binturongs live in the rain forests of Southeast Asia. They belong to a family of carnivorous mammals that also includes civets. The animals spend most of their time hanging out in the treetops. When they aren’t lounging on branches, they’re looking for yummy snacks such as insects, birds, and fruit. The animal uses its tail—which is almost as long as its body—like a fifth limb as it climbs through the forest. This tail is prehensile, which means it’s capable of gripping things. The binturong is one of only two carnivores that has a prehensile tail. (The other is the kinkajou.) By grasping onto branches and trunks with the furry extension, the binturong is able to move more easily along the trees. PASS THE POPCORN As they travel, binturongs rub a pungent substance produced in their scent glands onto branches and foliage. The animals use the odor to mark territory as well as to attract mates. The substance smells like buttery popcorn. With all its cool qualities, you definitely can’t turn your nose up at this odd-smelling animal! Text by Andrea Silen, NGS Staff
Find out what else makes the binturong so freaky in this episode of Freaky Creatures

Bull sharks are among the most dangerous sharks in the world, according to many experts. This is because they’re an aggressive species of shark, and they tend to hunt in waters where people often swim: along tropical shorelines. Bull sharks live throughout the world, in shallow, warm ocean waters. They’ve been known to swim up into freshwater rivers. Humans are not part of a bull shark’s normal prey. Bull sharks will eat almost anything, but their diet consists mainly of fish. They also sometimes eat dolphins and sea turtles. Bull sharks even eat other sharks. They hunt during the day and at night. Sharks must keep salt in their bodies to survive, and most can live only in salt water. But bull sharks have developed special adaptations—the way their kidneys function and special glands near their tails—that help them keep salt in their bodies even when they’re in freshwater. Scientists are still studying these sharks to figure out why they developed this unusual ability.
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A tree stands in a forest under a cloudy sky. Suddenly it appears as if a twig is crawling down the trunk. The object isn’t actually a twig that’s sprung legs—it’s a stick insect. The stick-like trickster uses its appearance to protect itself from enemies so it doesn’t end up in, well, a sticky situation. FOOLED YA Stick insects—also known as walking sticks—live in tropical and temperate (or mild) forests all over the world. Related to grasshoppers, crickets, and mantises, these creepy-crawlies are usually brown, green, or black. They’re also the world’s longest insects. The largest one ever found stretched 22 inches with its legs extended. (Most are only up to 12 inches long.) This bug spends much of its time in trees, munching on leaves. When predators such as birds approach, the insect tries to remain completely still in order to blend with the branches. If a predator isn’t fooled and grabs the bug by the leg, it’s no big deal. The insect can detach the leg and scuttle away. It will later regenerate, or grow back, the lost limb. A GOOD EGG About 3,000 species of stick insects exist. Some are master mimics even before they hatch. The females from these species lay eggs that look like plant seeds. This prevents carnivorous insects from eating the eggs. This crawler really knows how to go undercover. Text by April Capochino Myers
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Northern Mockingbird
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Hedgehogs have prickly spines everywhere except on their face, legs, and bellies. By curling into a tight ball and tucking in their heads, tail, and legs, they protect the parts of their bodies that do not have stiff, sharp spines. Often compared to pincushions, hedgehogs depend on their spines for defense—both while they sleep and when they face enemies. The head and body of adult hedgehogs range from 5 to 12 inches (13 to 30 centimeters) long and their tail can add 1 to 2 inches (3-5 centimeters). When hedgehogs are born—up to seven in a litter—their spines are soft and short. Soon after birth, their spines harden, becoming stiffer, sharper, and longer. Babies stay in the nest until they’re about three weeks old. By that time, their eyes are open, their spines are effective, and they can safely follow their mother outside the nest as she looks for food. Top on the hedgehog’s menu are insects, followed by small mice, snails, lizards, frogs, eggs, and even snakes. Hedgehogs sometimes add extra protection to their spines by „self-anointing.“ Immune to poisons in some plants, hedgehogs sometimes eat those plants and then make a frothy saliva in their mouths. The hedgehogs then lick their spines, spreading the saliva with the plant’s poison all over the spikes. Though hedgehogs mainly stay on the ground, they swim quite well and even climb trees.
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