When people want to find out about

When people want to find out about the weather, they usually go to their radios, TVs, newspapers, or the Internet. However, you can also find many weather signs among wildlife because of their highly developed senses. Drops in air pressure affect small mammals (哺乳动物) and insects in many ways. Try looking in or near the house. Mice are good weather indicators. People who spend a lot of time outdoors have observed that field mice come out of their holes and run around before a storm.Deer leave the high ground and come down from the mountains before a storm. If you see this, you can be sure that there will be a storm within two days. When you see large numbers of sea crabs on a sandy beach, it is time to leave. A change in air pressure over the water warns the crabs that a storm is coming. To escape the stormy sea pounding the shore, they leave the water and seek shelter on land.Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways. For example, some birds become easily annoyed and will fight over a piece of bread. Other birds sing just before a storm. It seems they know they won’t get another chance for an hour or two. Birds also seek shelter before a storm. You will sometimes see birds resting in trees or staying closely together on a wire near a building. This is a good storm signal.Seabirds sit out a storm on land. Anytime you see seagulls sitting on the ground in large groups, reluctant to fly, it is not a very good day to go sailing. It is unusual to see large groups of birds flying overhead in the summertime. Watch for other weather signs if you see this. You should also stay alert if you see migrating birds flying in the wrong direction. These birds may be flying ahead of a storm. And if you can’t see a bird anywhere, look out! They may have flown to a different place because a violent storm is coming in their direction.36. What’s the main idea of the passage?How to pay close attention to important clues in nature.How to become prepared for any kind of weather.How to predict weather changes by wildlife.