Why does the rooster crow in the morning?

"Oh, oh, oh", the rooster in the country kept crowing, waking people up from their dreams, as if to say, it's dawn, get up quickly!

Chickens are "living clocks", which the ancients called "birds that know the time". That's "the dog is watching, the chicken is in the morning" and "stay indoors while it's early, and the crow will see the sky early"

In the Zhou Dynasty in China, there was an official named Chicken Man who was in charge of the Chen Si. It is on this day of sacrifice that whenever a chicken crows, he specially wakes up 100 officials to hurry to court. Later, it developed into a "chicken man" who wears a red hat in the shape of a comb and rings the bell to announce the dawn every morning.

The crow of roosters is also a warning signal for people to motivate themselves to make progress. There is a story of "dancing at the smell of chickens": Zu Ti and Liu Kun both had lofty aspirations when they were young, vowing to expel the invading foreigners and revitalize the Jin Dynasty. They often sleep in the same bed, waiting for their pillows. After midnight, they scrambled to hear the cock crow and got up early. When they heard the cock crow, they immediately jumped out of the hot bed and ran to the garden to dance swords and halberds and practice martial arts hard, ready to serve the country at any time. Later, both of them became celebrities.

China is the first country to raise chickens in the world, and chickens were recorded in Oracle Bone Inscriptions in China during the Yin and Shang Dynasties. There are some poems in The Book of Songs, such as "The cock crows" and "The rooster perches on the tree". In ancient times, chickens were the first livestock used by livestock.

People all over the world have many customs related to chickens. When the ancients just married Jin Lan or formed a fraternal alliance between the two countries, there was a ceremony to kill chickens and drink blood. When people get married, the man goes to the woman's house to visit the bride and send a pair of male and female chickens to grow old together for one trillion years. Chickens are considered as a symbol of good luck. In China, Indian and Greek countries, the custom of cockfighting prevailed in ancient times. Until now, the custom of cockfighting still exists in Asia, Europe and America, especially in Brazil, Mexico, the Philippines and Myanmar.

"The rooster sings the world white." After long-term observation and research by scientists, it is proved that there is a wonderful "biological clock" in organisms, which guides their behavior. Chicken's "biological clock" grows in a small endocrine organ in the shape of a pine cone between the chicken's brain and cerebellum. Light can change the potential difference inside and outside the pineal gland cells, thus causing a chemical reaction and making the "biological clock" swing. It remembers the law of light and shade day and night, and directs the daily activities of the rooster: when it is almost dawn, the rooster will sing aloud; It's getting dark, so hurry to the cabin.