Download e-book for iPad: Animal Life in Groups (Animal Behavior) by Toney Allman

By Toney Allman

ISBN-10: 160413142X

ISBN-13: 9781604131420

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M. A. 2 miles (10 kilometers) long. Fish in the front of the school had fuller stomachs than fish in the back. Thus, position in a school has different advantages. Fish in the back use less energy, but fish at the front get more food. Swimming in a school helps fish find food, but they do not share it or help each other reach it: It is every fish for itself. Scientists believe that hungry fish choose to swim at the outer edges or front of the school. That gives them the best chance of finding food.

If the food is, for example, 40 degrees to the right of the sun, she waggles 40 degrees to the right of the vertical. Every worker watching the dance orients herself to the food by seeing the angle away from the vertical that the dancer describes. Then the watching bees fly to the food source, using the position of the sun as a guide. They stuff themselves with nectar to bring back to the colony. These complex behaviors are innate, or inborn. Each bee is born knowing how to dance and how to interpret communications.

Soldiers are arranged around the ball, ready to fight and die for the queen. The column moves as one, but amazingly, the workers and soldiers are all blind. They can stay together because they give off chemicals known as pheromones. The pheromones lay a trail that all the ants pick up and follow, either to a new bivouac or on a hunting trip. Pheromones help the ants to attack in concert, too. AttAcking AS one Any living animal in the path of the column is suitable prey. Most kinds of army ants cannot bring down animals any bigger than worms, insects, or small reptiles or mammals.

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Animal Life in Groups (Animal Behavior) by Toney Allman


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Categories: Zoology