Lately, people have entered the forests where chimpanzees live. The chimpanzees have been getting sick because of people's diseases. In addition, people are hunting chimpanzees. Their number is becoming smaller and smaller. Chimpanzees live in the plains and forests of Africa. They eat many kinds of foods, from plant leaves and seeds to insects and even other small animals. Chimpanzees' favourite food is fruit.

    Chimpanzees are very clever and they can use tools well. They can catch bugs by using sticks, and break nuts by using rocks.

    The world's forests are much smaller than they were before. Roads were built in deep forests, so people start to enter forests where chimpanzees live. That may lead to many problems. One problem for chimpanzees is that they can easily catch people's diseases and die. Chimpanzees are much closer to people than monkeys.

    As it's easier for people to enter forests, they hunt more often. Young chimpanzees are caught to be pets or for scientific researches. The young ones are taken away from the forests, and the adults are killed. Chimpanzees are likely to disappear in the future.

    In nature, you may see many insects and animals of different colours. Have you ever wondered why?

    Locusts are super delicious food for birds, but it is not always an easy job for birds to catch them. It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colours of locusts change with the colours of crops. When crops are young, locusts look green. But when autumn comes, locusts change to the yellow and brown colour as crops do.

    Brown bears, tigers and other animals move quietly through forests. They can't be seen easily by their enemies. This is because they have colours similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colourful like flowers. Soil insects are mostly dark coloured and they live under the soil in a dark and wet environment. However, insects with colours different from plants can easily be found and eaten by others. So in order to survive, they have to hide themselves in the daytime and appear only at night.

    Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over, its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.

    When IDr. Karen McComb came to Amboseli Park, her first task was to learn the names of the one hundred or so elephants most often seen.

    Scientists working in the park have learned to study elephants by watching them up close. They have a list of almost one thousand elephants. There are records for all of the elephants born since 1972. Amboseli was a good place for Dr. McComb to study animal communication. Elephants were a great subject because their lifestyle depends on communication.

    Dr. McComb and her team had learned a lot about elephant communication, but they kept on thinking about one puzzling watch. Some families were better at distinguishing calls of friends from those of strangers.

    What made some families smarter than others? The scientists searched their records for an explanation. To their surprise, there was only one factor of importance: The "smartest" families always had the oldest grandmothers. A family, as it did in all other activities, waited for some signal from the grandmother when they heard a strange contact call. And older, more experienced grandmothers were better at telling whether other elephants were strangers or friends just by their calls.

    That was an important discovery. It showed how an elephant family depends on the experience of the grandmother.

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Let's protect wild animals!

Why are some wild animals in danger?

1）Lose their homes;

2）Be killed for money.

Why is it important to protect wild animals?

1）We can't live without them;

2）They can keep the balance (平衡) of nature.

What can we do to protect wild animals?

1） …

2）…

    Hello, everyone!

    …

    Thanks for listening!

When the little animals are a little stronger, they must leave their parents and live .

—That's true.