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Giraffes grow about 4 feet (1.2 meters) in their first year of life. A newborn giraffe is about 6 feet (1.9 meters) tall at birth and weighs about 150 pounds (68 kilograms). Many young giraffes, called calves, die from lion attacks during their first year of life. Once a giraffe reaches adulthood its height is often enough to protect it from lions. Adult giraffes, however, must still be careful of lions when they are bending down to drink water or rest. Usually giraffes will drink or rest in shifts so that at least one giraffe is always on the lookout for approaching predators. The giraffes‘ height and excellent vision give them a wide view of the grasslands where they live, making it easy to spot predators from a distance. Some scientists believe that other animals—such as zebras, antelope, and wildebeests—often congregate near giraffes to take advantage of their ability to see danger from a distance. The giraffe could be considered the early warning system of the African grasslands.
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Hippopotamuses are large mammals found in sub-Saharan Africa. Their name comes from the Greek word for “river horse” because they’re often found in water, which helps them stay cool in the hot, tropical climate where they live.
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Flamingos are famous for their bright pink feathers, stilt-like legs, and S-shaped neck. When a flamingo spots potential dinner—favorite foods include shrimp, snails, and plantlike water organisms called algae—it plunges its head into the water, twists it upside down, and scoops the fish using its upper beak like a shovel. They are able to „run“ on water, thanks to their webbed feet, to gain speed before lifting up into the sky. Flamingos build nests that look like mounds of mud along waterways. At the top of the mound, in a shallow hole, the female lays one egg. The parents take turns sitting on the egg to keep it warm. After about 30 days, the egg hatches. Flamingo young are born white, with soft, downy feathers and a straight bill. The bill gradually curves downward as the flamingo matures. Both parents take care of the newborn flamingo, feeding it a fluid produced in their digestive systems. The young leave the nest after about five days to join other young flamingos in small groups, returning to the parents for food. The parents identify their chick by its voice. After about three weeks, the adults herd young flamingos into large groups called crèches where they start to look for food on their own. Most flamingo species are not endangered, although the Andean flamingo is listed as Vulnerable, and the Chilean, Lesser, and Puna flamingos are Near Threatened.
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Octopuses are sea animals famous for their rounded bodies, bulging eyes, and eight long arms. They live in all the world’s oceans but are especially abundant in warm, tropical waters. Octopuses, like their cousin, the squid, are often considered “monsters of the deep,” though some species, or types, occupy relatively shallow waters. Most octopuses stay along the ocean’s floor, although some species are pelagic, which means they live near the water’s surface. Other octopus species live in deep, dark waters, rising from below at dawn and dusk to search for food. Crabs, shrimps, and lobsters rank among their favorite foods, though some can attack larger prey, like sharks. Octopuses typically drop down on their prey from above and, using powerful suctions that line their arms, pull the animal into their mouth. The octopus performs its famous backward swim by blasting water through a muscular tube on the body called a siphon. Octopuses also crawl along the ocean’s floor, tucking their arms into small openings to search for food. Seals, whales, and large fish prey on octopuses. If threatened, octopuses shoot an inky fluid that darkens the water, confusing the aggressor. The octopus can also change to gray, brown, pink, blue, or green to blend in with its surroundings. Octopuses may also change color as a way to communicate with other octopuses. Octopuses are solitary creatures that live alone in dens built from rocks, which the octopus moves into place using its powerful arms. Octopuses sometimes even fashion a rock “door” for their den that pulls closed when the octopus is safely inside.
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When a great white shark is born, along with up to a dozen siblings, it immediately swims away from its mother. Born on the east and west coasts of North America, the south of Africa and southwest Australia, baby sharks are on their own right from the start. Their mother may see them only as prey. At birth the baby shark is already about 5 feet (1.5 meters) long; as it grows it may reach a length up to four times that. The pup (which is what a baby shark is called) will live its life at the top of the ocean’s food chain. But before it grows larger, the pup must avoid predators bigger than it is—including other great white sharks. Many baby sharks do not survive their first year. Young great white sharks eat fish (including other sharks) and rays. As they grow, the sharks’ favorite prey becomes sea mammals, especially sea lions and seals. Sharks count on the element of surprise as they hunt. When they see a seal at the surface of the water, sharks will often position themselves underneath the seal. Using their tails as propellers, they swim upward at a fast sprint, burst out of the water in a leap called a breach, and fall back into the water with the seal in their mouths. They can smell a single drop of blood from up to a third of a mile (0.53 kilometers) away. Sharks don’t chew their food; they rip off chunks of meat and swallow them whole. They can last a month or two without another big meal.
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Balanced on a rock in the middle of a river, a black bear lowers her head to the water and … chomp! A wriggling salmon is no match for her strong jaws. She’s spent the summer eating berries and roots—now she’s eating all the salmon she can catch to gain as much weight as possible. She needs enough stored fat for her body to make milk for newborn cubs this winter.
This way, they don’t have to leave their dens and hunt for food in the bitter cold

The ostrich is the tallest and the heaviest of all birds. While the huge ostrich is a bird, it does not fly. Instead it runs. One stride can cover up to 16 feet (4.9 meters)—about the length of a mid-size family car! The bird is speedy, too. It can run just over 40 miles (64 kilometers) an hour for a short distance, and can keep up a speed of more than 30 miles (48 kilometers) an hour over longer distances. The ostrich uses its short wings for balance, holding them outstretched when it runs. Strong legs can also be used for self-defense. An ostrich will kick with a force mighty enough to kill a lion. When danger approaches, an ostrich will often lie low to hide, stretching its neck along the ground. Its feather colors blend with the sandy soil where it lives. From far away, it looks like the ostrich has buried its head in the sand. Many people thought that was what ostriches did when they were trying to hide, but that is a myth. Ostriches live near grazing animals such as wildebeest, antelopes, and zebras. The grazers stir up insects and rodents for the ostriches to eat, and the ostriches warn the grazers to dangers such as approaching lions. An ostrich group, called a herd, numbers about 12 individuals. Male ostriches compete for control of a group of several females. A herd has a dominant male and a dominant female. She mates only with him, though he may mate with other females as well. All the egg-laying females, called hens, lay their eggs in the nest of the dominant female. Then that female—whose eggs are positioned in the center of the nest, the most well-protected spot—and her mate take care of all the eggs in that one nest. Each egg can be up to 6 inches (15 centimeters) long and weigh 3 pounds (1.5 kilograms)!
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When an elephant drinks, it sucks as much as 2 gallons (7.5 liters) of water into its trunk at a time. Then it curls its trunk under, sticks the tip of its trunk into its mouth, and blows. Out comes the water, right down the elephant’s throat. Since African elephants live where the sun is usually blazing hot, they use their trunks to help them keep cool. First they squirt a trunkful of cool water over their bodies. Then they often follow that with a sprinkling of dust to create a protective layer of dirt on their skin. Elephants pick up and spray dust the same way they do water—with their trunks. Elephants also use their trunks as snorkels when they wade in deep water. An elephant’s trunk is controlled by many muscles. Two fingerlike parts on the tip of the trunk allow the elephant to perform delicate maneuvers such as picking a berry from the ground or plucking a single leaf off a tree. Elephants can also use its trunk to grasp an entire tree branch and pull it down to its mouth and to yank up clumps of grasses and shove the greenery into their mouths. When an elephant gets a whiff of something interesting, it sniffs the air with its trunk raised up like a submarine periscope. If threatened, an elephant will also use its trunk to make loud trumpeting noises as a warning. Elephants are social creatures. They sometimes hug by wrapping their trunks together in displays of greeting and affection. Elephants also use their trunks to help lift or nudge an elephant calf over an obstacle, to rescue a fellow elephant stuck in mud, or to gently raise a newborn elephant to its feet. And just as a human baby sucks its thumb, an elephant calf often sucks its trunk for comfort. One elephant can eat 300 pounds (136 kilograms) of food in one day. People hunt elephants mainly for their ivory tusks. Adult females and young travel in herds, while adult males generally travel alone or in groups of their own.
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Some jaguars are so dark they don’t seem to have spots.