Why does the blue bird represent happiness?

In novels, blue birds were often seen as a symbol of happiness, mainly because of their image in the wild. Bluebirds were green feathered birds with slender wings and a sharp beak. They were often depicted as free, independent, and happy. In myths and legends, blue birds were often associated with happiness and good luck. For example, in ancient Chinese mythology, when the Emperor of Heaven created the world, he used the green bird as a medium to let humans come into contact with the gods. Therefore, the blue bird was regarded as a symbol of happiness and good luck and often appeared in various literary works. However, it should be noted that the symbolic meaning of the blue bird may vary from work to work. Some novels may associate the blue bird with misfortune or pain. Therefore, the readers had to make judgments based on the specific storyline and cultural background.