① Can animals talk? It is true that they are not able to use words like ours, but most of them can talk in their own way.

② When the cat is happy and pleased, how does she show it? She purrs, and this is her way of saying. “I am quite happy now.” If she is unhappy, or in pain,or hungry, she mews. If she is angry, she sets up her back and moves her tail from side to side. If she is treated(对待) in a way she does not like, her tail goes straight up in the air, and she walks out of the room.

③ If your dog is pleased, he puts back his ears, waves his tail, and seems to smile. If he is angry, he growls(咆哮), shows his teeth, puts up his tail and the hair along his back and neck, walks around slowly, and makes himself look very fierce（凶猛的）. This is the dog’s way of saying. “I am mad, I have a mind to bite you.”

④When a hen sees a dog coming near her chickens, have you noticed how she waves her wings, raises her tail, and rushes to the dog? This is her way of saying.“Be off, or I will peck you with my hard beak(喙)”. If she sees a hawk（鹰）, she makes a strange noise, and her chickens at once run away and hide themselves. They understand their mother to say.“Quick, get out of sight, dears! There is danger near.”When she finds some nice food, she makes another kind of noise. The chickens know quite well what it means, and run at once to share the food their mother has found for them.

⑤ In such ways as these, animals make themselves understood almost as well as if they could talk like humans. They tell their feelings to one another by acts and by sounds just as we do by words.

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A lot of animals travel from one place to another. We call this migration.

In Africa, large animals, like elephants and zebras, migrate to find food and water. They usually follow the same ways every year.

A lot of birds migrate to find food and better weather, too. They are usually birds that eat insects. They spend the summer in northern Europe, because there are lots of insects there. In the winter there aren’t any insects, so the birds fly south to southern Europe and Africa.

Some insects migrate, too. In North America, millions of monarch butterflies fly south to spend the winter in Mexico, California and Florida, where it’s warmer. They travel 50—65 km each day and they travel about 1.125 km.

Some fish migrate to breed(繁殖). Salmon(鲑鱼) can swim over 20,000 km in their life. They are born in rivers in Ireland, Scotland and other places in northern Europe. The young fish swim down the river to the sea and into the Atlantic Ocean. They live in the ocean until they are adults. Then they return to the river where they were born. They lay their eggs in the river and then they usually die. Salmon do this, because their eggs are safer in the river. Other fish can’t eat them.

Arctic terns(北极燕鸥) travel the furthest when they migrate. They spend the summer in the Arctic, but when winter comes they fly to the Antarctic, because it’s summer there. The next year they fly back to the Arctic again. In one year these small birds travel 36,000 km from one end of the earth to the other and back again.

Pigs are not only lovable in everyday life but also popular in books and movies. Look at the following cartoon characters, are you a fan of pigs?