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The top shell of a tortoise is called the carapace; the shell that covers a tortoise’s belly is called the plastron. The populations of Galápagos tortoises that live on the hotter and drier islands of the Galápagos have developed shells that are saddle-shaped with a high notch above the neck. This allows them to stretch their necks higher to reach vegetation that grows above the ground. The Charles Darwin Research Station in the Galápagos raises captive Galápagos tortoises. This conservation organization reintroduces many tortoises back into the wild once they’ve grown big enough that predators don’t pose a danger. The only native natural predator of the Galápagos tortoise is the Galápagos hawk. The hawk preys on eggs and newly hatched tortoises. The main threats to adult tortoises are habitat destruction and illegal hunting. The Galápagos Islands, discovered by Spanish sailors in 1535, were named after the giant tortoises discovered there. Galápago means tortoise in Spanish. Tortoises lay eggs. Females lay their eggs in nest holes, which they cover and leave. Babies hatch in four to eight months. They are on their own from the beginning.
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During the mating season, male blue-footed boobies strut around with exaggerated movements that show off their fabulous blue feet. Females tend to pick the males with the bluest feet as their mates. Parents take care of their chicks feeding and protecting them—until they’re about two months old. At that point, young boobies can survive on their own. Blue-footed boobies sleep at night, generally on land, and feed at sea during the day. Sometimes boobies feed in a group. They often fly far out to sea to look for their prey—small fish such as anchovies. The birds either zip underwater for fish from a floating position on the water’s surface or make awesome dives from as high as 80 feet (24 meters) in the air. Once it spots a school of fish, the bird folds those wings back, becoming a streamlined, torpedo-shaped predator. The booby dives into the water among the school of fish, using its long beak to grab dinner.
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Why do we „fall back?“
days signal critters from deer to birds to bears that it’s time to gather food and find

Koalas are marsupials, related to kangaroos.
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Harp seals spend most of their time diving and swimming in the icy waters of the North Atlantic and Arctic Oceans. These sleek swimmers often hunt for fish and crustaceans at 300 feet (90 meters) and may dive to nearly 1,000 feet (300 meters). They are able to remain submerged for up to 15 minutes. During mating season, females form large colonies on floating ice and give birth to young. Older seals return annually to pack ice to molt. They lose their pelts and top layers of skin and grow a new fur coat every year. Harp seals are sometimes called saddleback seals because of the dark, saddlelike marking on the back and sides of their light yellow or gray bodies of the adults. Baby seals are born on pack ice floating in the North Atlantic and Arctic Oceans. Harp seal mothers are able to identify their babies by their smell. The pups don’t have any blubber at birth, but quickly gain weight nursing on high-fat mother’s milk. When the pups reach about 80 pounds (36 kilograms), their mothers stop nursing them. The pups go without food for about six weeks and can lose about half their body weight until they dive in and begin to hunt for themselves. The young seals are famous for their snowy white coats.
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Spider monkeys have long, thin arms with hooklike hands that allow them to swing through the trees. They do not have opposable thumbs. The brown-headed spider monkey has a prehensile tail, which means it can grasp and can be used like a fifth limb to grab trees. During the day, the spider monkey searches for fruit, which makes up the main part of its diet. They will also eat flowers, seeds, bark, leaves, and small insects during the dry season when fruit isn’t available. They spend most of the daylight hours climbing and swinging through the high canopy of trees. The brown-headed spider monkey lives in a large community of about 20 to 100 male and female monkeys. They split into smaller groups for feeding. Females usually give birth to only a single baby each year or two. Young monkeys are carried on their mothers‘ stomachs until about 16 weeks old. Then they are strong enough to ride on their mothers‘ backs. All brown-headed spider monkey infants are born with a pink face and ears. Spider monkeys hug each other and wrap their tails around each other. They are very intelligent and have robust memories. They were named spider monkeys because they look like spiders as they hang upside down from their tails with their arms and legs dangling. Their genus name is Ateles, which means “imperfect.” This refers to the fact that they don’t have thumbs. Hunting the brown-headed spider monkey is now prohibited in Ecuador, but humans have killed them for their meat for hundreds of years. Text by Anne A. McCormack / NGS Staff
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Northern Mockingbird
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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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