Download Animal Life in Groups (Animal Behavior) by Toney Allman PDF

By Toney Allman

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Extra info for Animal Life in Groups (Animal Behavior)

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Each animal tries to stay safe in the center of the herd, where no predator can reach. The herd seems leaderless, disorganized, and even chaotic, but it drives forward as one, seeking the food it needs to survive. offering up A feASt February, when the plains are lush with green grass, is the time of greatest danger for a wildebeest herd. Thousands of female wildebeest give birth to calves in synchrony with one another. The birthing period lasts for about three weeks. Females lie down, give birth in about 10 minutes, and are on their feet as soon as possible.

Nevertheless, scientists have discovered that wildebeest are safer in a herd than they are alone. Wildebeest are large antelopes. 4 meters) tall and weigh up to 600 pounds (272 kilograms). Such a big animal cannot hide from predators, especially on a treeless plain. In a large group, however, each animal can “hide” by being surrounded by thousands of others. Hundreds of thousands of animals are visually confusing. Usually, only the stragglers are in danger. Adult wildebeest are powerful. They have large, dangerous horns.

Ruxton describe a study by Stephen G. Reebs that showed that fish can follow leaders and learn from them. In 2000, Reebs taught 12 shiners to come to a certain place in his large fish tank for food. Once the fish learned where they could expect to be fed, Reebs split them up. He placed one, two, or three trained fish with a These minnows in a lake are swimming in different directions—an action which works as a defense against predators. Many darting fi sh distract a predator from being able to single out one to eat.

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