I am Xiao Lianbi, a little weather forecaster

There were constant thunderstorms during the summer vacation last year, and I didn’t go anywhere for two months. I can only play nearby with my classmates when the weather is fine, which is not bad. One day, I was watching TV at home, and suddenly I heard the chirping of birds outside the window. I immediately became happy: Isn’t there a proverb, “It rains for a long time and you hear the birds singing, and it will soon turn sunny.” It seems that the weather will soon be sunny. . But I thought again: It’s not impossible for the baby bird to have nothing to do in the nest and chat with its parents! I looked at the sky again, dark clouds almost covered the entire city, and there was rumbling thunder. The rain was still falling, and the trees were swaying from side to side in the roaring wind. "Oh my God! Can such a heavy rain stop just as soon as it stops? This proverb must be made up," I said to myself. But after about an hour, the rain became lighter, the thunder was no longer heard, and the wind was not as strong as before. At night, the clouds dispersed and you could clearly see the stars hanging in the sky. It seems that the proverb is quite accurate. Why is this? It turns out that when the rain is about to stop, the air will gradually dry, the water vapor on the bird's wings will gradually decrease, the wings will become lighter, and the bird can fly again. .

Although my judgment was wrong, I understood the scientific truth from it. The bird is really a "little weather forecaster"!