One day, mother bird is going to have a baby. She flew and flew to a small green tree. She smiled and said to the little tree, "Brother, can I build a nest on your branch?" Brother Xiaoshu shook his head and said, "That won't do. I am growing up. If you build a nest on my branch, I can't stand it. " Mother bird flew to a big tree again and said politely, "Brother Tree, can I build a nest in your tree?" Brother Dashu also shook his head and said, "That won't do. How uncomfortable it is for you to jump on my branch every day! " Mother bird flew away sadly and landed on an old tree. She said to the old tree, "Grandpa Tree, can I build a nest on your branch?" Grandpa Tree said happily, "Of course. I'm just looking for a partner! "Mother bird said excitedly," Thank you, Grandpa Tree. "Mother bird flew to a dense forest, grabbed twigs and built a nest. He flew under the tree again, picked up the leaves and spread them in the nest. He flew to the grass again, grabbed the grass and spread it on it. Busy for several days and nights, a nest was built, cold and warm. Mother bird laid three eggs in the nest and hatched for several weeks. As time went on, the egg cracked and the bird was finally born. Mother bird is very happy because she has a warm home and three birds. Grandpa Tree tries his best to take care of the bird family. In summer, the sun shines on the trees like fire. Grandpa Tree covered the sun with branches and leaves and held up an umbrella for the birds. At night, when the cold wind blows, Grandpa Tree uses his leaves to shelter the birds from the wind and rain. When Grandpa Tree is lonely, Mother Bird twitters and sings and dances to Grandpa Tree with the children on the tree, which makes Grandpa Tree happier. There are bugs on Grandpa Tree's trunk, so Mother Bird takes her baby to catch bugs for Grandpa Tree. As soon as mother bird caught the bug, she told her friend about Grandpa Tree's kindness. All her friends built nests in that old tree and sang and danced for Grandpa Tree. Grandpa Tree is getting younger and younger, and many new leaves are growing. This old tree has become a paradise for birds.
The big trees and small trees next to them are full of insects, their leaves are yellow, their branches are broken and they are dying. They said with tears, "It's all because we are too selfish. We help each other, benefit others, and be selfish and harm others and ourselves. People! You must learn our lesson.