Once upon a time, the cockatoos were all white. But now look at the trees and see a cockatoo, you will notice that its crest is yellow.
Long ago, the other birds Cockatoo mocked because I did not no colors. One day, found three colored pens. The collected and put in the queue.
When he walked, he noticed that the other birds were feathers. They began to pluck feathers cockatoo.
The Cockatoo flew and flew and hit the sun.
The sun was so hot it made its yellow crest and went shooting at the ground.
So you cockatiels have yellow crests.