By Toney Allman
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Extra info for Animal Life in Groups (Animal Behavior), 1st Edition
The large, noisy herd is obvious to predators. The thousands of daily births make it easy for predators to fi nd calves. 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.
Each caste has a special job. Third, three or more generations live together in the colony. All the insects protect and raise the young, even though most never mate and 34 colonies of ultimate cooperators 35 Army ants are born with the instinct to function as part of a group. These African ants exemplify how soldier ants gather in lines to guard a central column of worker ants as they cross a road in a Ghana rainforest. reproduce. All species of ants are eusocial, as are honeybees, termites, and some wasps.
The full bat then gives some blood to the hungry one. this behavior looks altruistic, but according to verna case of davidson college in davidson, north carolina, it is not. the well-fed bat is guaranteeing its own survival by being generous and sharing. At any time in the future, this bat can expect the same help when it has had a hungry night. the bats are able to tell which bats have food to share by the shapes of their stomachs. they also remember which bats shared food in the past. Some bats cheat: they are given food, but do not return the favor.