The image of the partridge bird: The partridge song is very special, and it sounds as if it is calling for "don't go too far", which is very easy to evoke the association of hard journey and full of parting thoughts. Therefore, in the works of the ancients, the crowing of partridges is always regarded as a kind of parting sound, such as "The sunset is boundless, the autumn grass is bright, and partridges are far away from people" (Li Qunyu in the Tang Dynasty's "Jiuzipo smells partridges"), "The river is sad at night and the mountains are deep." It cannot be used to express a happy mood.
The image of cuckoo: cuckoo, also known as Du Yu, Zigui and folk cuckoo. Because its oral epithelium and tongue are red, the ancients mistakenly thought it was full of blood, so people would cry for it and make the quarrel bleed. Legend has it that Du Yu, the monarch of Shu, retired from Zen and died unfortunately. After his death, his soul became a bird, and he cried in late spring, causing his mouth to bleed. So the names of people and birds became one. In ancient poetry, "cuckoo" is often used to render sad atmosphere or homesickness. For example, Li Shangyin's "Jinse": "Wang's longing for spring is crying in the cuckoo"; Xin Qiji's Dingfengbo: "After beginning of spring, Du Fu sounded sad." Another example is Li Bai's "Difficult Road to Shu": "Come on, cuckoo crow, worry about the empty mountain." When the bird crows, it is in full bloom. According to folklore, the cuckoo crows and sprinkles blood on the flowers, so it is also called azalea, so the flowers and birds have the same name. It is also because it can be heard almost day and night before and after the canopy, which is a bit bleak. The cry is characterized by four tones-"Goo Goo Goo Goo" and "Fast Broadcast Valley! Hurry and sow the valley! " It seems that people are called to sow seeds, so the countryside calls it cuckoo. Rhododendrons are generally used to express sadness, not joy.