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The aardvark gets its name from a South African word meaning “earth pig.” Although the aardvark looks like a pig, especially with its body and snout, aardvarks actually share common ancestors with elephants and golden moles. Aardvarks live throughout much of sub-Saharan Africa. STRONG CLAWS Aardvarks use their large front claws to dig holes at a rate of 2 feet (0.6 meters) in 15 seconds so they can quickly get to their favorite meal: termites and ants. Aardvarks have long, sticky tongues, which can be up to 12 inches (30 centimeters) long. Each night, they are able to dig up termite mounds and ant nests and slurp up and swallow tens of thousands of insects. Aardvarks are most active at night and tend to live alone. During the day, they sleep curled up in a ball in their burrows. As night falls, aardvarks will emerge cautiously from their dens, jumping around on the lookout for predators. They are able to see at night, but otherwise have poor vision and are color-blind. They rely on their senses of sound and smell, using their long ears and snouts to get around and find insects. Female aardvarks give birth in their burrow usually to one baby at a time. A baby aardvark stays in the burrow for two weeks and then begins to venture out to forage at night with its mom. Babies begin digging for their own meals when they reach six months and they grow to full size in about one year. The aardvark’s fast digging skill also helps protect it from predators, such as hyenas and lions. When threatened, an aardvark can dig a hole and cover itself up in about ten minutes. Its large claws are another layer of defense. Though aardvarks remain widespread, humans are the aardvark’s biggest threat. Some landowners don’t like the holes that aardvarks leave behind and kill the aardvarks. The use of pesticides to grow crops on land inhabited by aardvarks has also reduced the number of insects available for aardvarks to eat. Text by Jed Winer/NGS Staff
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A blob the size of a teacup slinks along the ocean floor in the shallow waters off of Australia. It’s a type of sea slug called the nudibranch (NEW-dih-bronk), a slime-oozing creature with a boneless body. Many of them also sport brilliant colors and eye-catching patterns on their skin. In fact this sticky slug is often considered one of the most beautiful animals in the world. IN THE MOOD FOR FOOD Over 3,000 species of nudibranchs exist, and most live in shallow, tropical waters. They can be anywhere from a quarter of an inch to 12 inches long and can weigh up to 3.3 pounds. These sea slugs spend their time sliding on their bellies around their habitat in search of snacks. The animals have a set of curved teeth, which they use to eat coral, sponges, and fish eggs off the ocean floor. Nudibranchs use tentacles on their heads to poke around for grub. TRUE COLORS The nudibranch’s meals don’t just satisfy its hunger—the food also gives the animal its coloring. When the sea slug eats, it absorbs and displays its prey’s pigment—the substance that gives the prey its color. Some nudibranchs also absorb toxins from certain prey and secrete the poison from their own skin. This allows them to fend off enemies such as fish. So the nudibranch is stunning, resourceful, and it recycles? This slug sounds far from sluggish! Text by Andrea Silen / NGS Staff
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Stingrays, with their wide, flat bodies, may not look like fish, but they are. They are related to sharks, and like their shark cousins, they do not have bones. Instead, their bodies are supported by cartilage—the same material that you feel inside the tip of your nose. Stingrays have broad fins that run the full length of their bodies, giving them a flat, roundish shape. To swim, some stingrays move their whole bodies in a wavy motion that propels them through the water. Other species flap their fins like bird wings and „fly“ through the water. Stingrays have tails that are armed for defense. Some kinds of stingrays have a spine in their tail with a very sharp point and edges that are serrated or notched. Many species, including the exotic-looking blue-spotted stingray, have venom that is delivered through their tails. That venom, and the spine itself, can be dangerous to humans. Stingrays prefer shallow, near-shore waters in warm parts of the world. Here, they spend most of their time lying partially buried on the ocean floor hiding from predators, like sharks, or waiting for prey to swim by. Their colors usually match the mud or sand they hide in. While a stingray’s mouth is on the underside of its body, along with its nostrils and gill slits, its eyes are on the top. Scientists don’t think they use their eyes for hunting very much though. Instead, they use special sensors called ampullae of Lorenzini, which can detect the tiny electrical charges emitted by their prey. Prey for stingrays includes clams, oysters, shrimps, crabs, and mussels. When they find dinner, stingrays crush their meal using strong jaws. Generally, female stingrays give birth once a year. They usually have two to six young at a time. While a baby stingray is still inside its mother, it grows to be quite large and developed so that when it’s born, it looks like a little adult. From birth, the young stingray is able to fend for itself.
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Get the dirt on our planet and what makes it so awesome.
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It’s a quiet, warm summer evening with no human in sight for miles in the woods. As the sun sets, tiny flashes of light start to flicker throughout the trees. At first there’s just a few, but soon hundreds of blinking lights are floating in the forest. Fireflies have come out for the evening.
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Fastest mammal on land, the cheetah can reach speeds of 60 or perhaps even 70 miles (97 or 113 kilometers) an hour over short distances. It usually chases its prey at only about half that speed, however. After a chase, a cheetah needs half an hour to catch its breath before it can eat. The cheetah’s excellent eyesight helps it find prey during the day. The cheetah is hard to see because its spotted coat blends with the tall, dry grass of the plains. Suddenly, the cheetah makes a lightning dash. It knocks its prey to the ground and then bites its throat. Once found throughout Asia and Africa, cheetahs today are racing toward extinction. Loss of habitat and declining numbers of their prey combine to threaten the future of these cats. Cheetahs live and hunt mainly in open grasslands and bushy areas in parts of Africa and the Middle East. Cheetahs eat small- to medium-size animals, such as hares, impalas, wildebeest calves, and gazelles. Because of their size, strength, and predatory skills, cheetahs are considered one of the “big cats.â€� Tigers, lions, leopards, jaguars, and cougars are also part of this grouping. Take the big cat quiz to see how much you know about these fierce felines. Then, just for fun, see which wild cat you’re most like with our personality quiz.
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Not far from the North Pole, the world is frozen for thousands of miles. Suddenly a snowy mound wiggles and reveals two dark eyes. The lump is transformed into the furry white body of a lone arctic fox. The canine casually shakes the blanket of snow off her thick coat—the key to her survival. But warm fur alone might not keep this fox alive during the polar winter, when temperatures rarely get above zero degrees Fahrenheit. Until spring arrives, this arctic fox will rely on some freeze-defying strategies, making it a champion of the cold.
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Caring people pass laws to help these canines expand their territory.
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