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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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White-handed gibbons are small tailless apes with soft, thick fur. They live in trees and like to stay high up in the canopy of trees. Their very long arms allow them to swing effortlessly among the tree branches. They can also change direction in a split second, and can catch birds in midair and eat them after landing. Gibbons are among the fastest of all primates. They are so fast that they barely touch a branch before swinging off and grabbing the next branch, and they „fly“ up 40 feet through the air and leap long distances before landing. They can cross rivers or large openings in the forest with this acrobatic technique. Gibbons sometimes have accidental falls if a branch breaks and they do suffer from bone fractures in the wild. They sleep sitting up in trees with bent knees and faces buried between the knees and chest. Gibbons are bipedal and walk across tree limbs on two feet. They hold their arms high in the air for balance when they walk or run along the ground or on branches. White-handed gibbons have white fur on the upper sides of their hands and feet. They live in small family groups made up of a male and female pair and their young. They sing duets, with the male and female complementing each other’s part. These duets help the couple bond and mark their territory. The white-handed gibbon is sometimes hunted for its meat and young gibbons are sold in the pet trade in some countries, particularly Thailand. Many are white at birth and do not develop their final color until two to four years old. Text by Anne A. McCormack/NGS Staff
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Wherever there is dung (also known as poop), there are most likely dung beetles. They belong to three basic groups: rollers, tunnelers, and dwellers. Those words describe how these beetles use the dung they find. The rollers shape pieces of dung into balls and roll them away from the pile. They bury their ball to either munch on later or to use as a place to lay their eggs. Tunnelers bury their dung treasure by tunneling underneath the pile. And dwellers actually live inside dung piles. Dung beetles are found worldwide, on every continent except Antarctica. They live in habitats that range from desert to forest. Most prefer dung from herbivores, or animals that eat only plants, but some will seek dung from omnivores, or animals that eat plants as well as meat. When an animal such as an elephant chews, swallows, and digests, there are always parts of its meal that pass through undigested. Those undigested bits pass out of the animal in its dung—and that is what provides food for dung beetles. Dung beetle larvae, or young, eat the solid dung while adult dung beetles stick to liquids. There is a good bit of nutritious moisture in dung, and adult beetles suck up that juice.
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You probably know sea stars as starfish, the name sea stars are commonly known by. But sea stars aren’t really fish. Sea stars, like sea urchins and sand dollars, do not have backbones, which makes them part of a group called invertebrates. Fish have backbones, which makes them vertebrates. Got it? Most sea stars sport spiny skin and five arms, although some can grow as many as 50 arms. The arms are covered with pincerlike organs and suckers that allow the animal to slowly creep along the ocean floor. Light-sensitive eyespots on the tips of the arms help the sea star find food. Favorites on the menu include mollusks such as clams, oysters, and snails. The sea star eats by attaching to prey and extending its stomach out through its mouth. Enzymes from the sea star’s stomach digest the prey. The digested material enters the sea star’s stomach. Tiny organisms can be swallowed whole. Sea stars occupy every type of habitat, including tidal pools, rocky shores, sea grass, kelp beds, and coral reefs. Some sea stars even live in sands as deep as 20,530 feet (9,000 meters). Sea stars aren’t social creatures, but they will congregate in large groups during certain times of the year to feed.
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Rise and dine! Check out breakfast meals from five countries that are so good you’ll stop hitting the snooze button.
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Northern Mockingbird
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You may weigh more than a whooping crane (and if you don’t you better start getting seconds at dinner), but you probably aren’t taller than one! Adults are about five feet tall, which makes them the tallest birds in North America. But even as tall as they are, whooping cranes weigh only about 15 pounds, thanks to their hollow bones. WHAT’S FOR DINNER? Whooping cranes live in wetlands, marshes, mudflats, wet prairies, and fields. They’re not picky about their meals—they have a varied diet and eat small fish, reptiles, and insects, as well as grains, marsh plants, and acorns. CALL OF THE WILD Whooping cranes really like to ‚whoop it up‘ when it comes to attracting a mate. They call loudly and do what might look like a crazy dance to get attention. They flap their wings, shake their heads, jump up and down, and toss around feathers and grass! These birds are endangered, but scientists have used some pretty interesting tricks to help them survive. First they relocated one flock to Florida, but the birds never learned to migrate. Conservationists were determined to help the birds flourish and thrive, so they used a special trick with another Florida flock. Scientists „taught“ the younger birds to migrate by having them follow an ultralight aircraft from Florida to Wisconsin. After the birds bred and hatched their chicks, they’d follow the plane back to Wisconsin! In addition to the year-round Florida flock and the one that migrates from Florida to Wisconsin, another flock flies from Texas to Canada and back again each year. These whooping cranes are really spreading their wings! Text by Laura Goertzel /NGS Staff
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Sliding and wrestling, belly flopping, and somersaulting, river otters really know how to play! They take advantage of any slippery slope for fun, whether it’s a summer slide down a muddy hill or a winter thrill on snow and ice. They glide on their bellies with their front paws by their sides. River otters are aquatic mammals. They generally live along rivers, as their name implies, but they’re also found near streams and lakes. Otters prefer water bordered by woods and with wetlands, such as marshes, nearby. Flexing their long bodies up and down, paddling with their webbed hind feet, and using their feet and strong tails to steer, river otters are underwater acrobats. They can stay underwater for up to four minutes. As they dive, they close their ears and nostrils to keep water out. They hunt underwater, skillfully chasing fish, their main food. Otters grab their prey in their mouths. When the otters catch large fish, they haul them onto shore to dine. While river otters spend most of their time in water, they do travel across land as well—often in search of a mate. Otters even make their land travel look playful. They run a few steps and then slide on their bellies. Clearly, otters know how to have fun!
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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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Bison are the iconic image of the Great Plains and the Old West. They are massive, shaggy beasts and the heaviest land animals in North America. Despite their hefty size, bison are quick on their feet. When the need arises they can run at speeds up to 40 miles (65 kilometers) an hour. Their curved, sharp horns can grow to be 2 feet (61 centimeters) long. Females (cows) and adult males (bulls) generally live in small, separate bands and come together in very large herds during the summer breeding season. Males wage battles for mating rights, but such contests rarely turn dangerous. Females give birth to one calf after a nine-month pregnancy. Bison once covered the Great Plains and much of North America, and were critically important to Plains Indian societies. During the 19th century, settlers killed some 50 million bison for food, sport, and to deprive Native Americans of their most important natural asset. The once enormous herds were reduced to only a few hundred animals. Today, bison numbers have rebounded somewhat, and about 200,000 bison live on preserves and ranches where they are raised for their meat.
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