In modern society, the popularization of artificial lighting has long eliminated the difference between day and night. Not only human beings are deeply affected by various health problems caused by the decline of melatonin levels caused by "artificial sunlight", but other animals that follow human beings are also deeply affected. Britain's national bird-Eurasian robin, commonly known as "robin"-is completely unknown now. According to the Royal Society for the Protection of Birds (RSPB), in many places they sing all night, which is caused by street lamps.
In other words, if the dawn doesn't crow, there are several reasons: First, the rooster sees the moonlight; Second, I saw lights and flames; Third, because of the noise and noise around. These are all because roosters are too sensitive.
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Cock crowing is a kind of "declaration of sovereignty". On the one hand, it reminds family members of its supreme status, on the other hand, it warns neighbors that roosters should not play tricks on their families. Roosters crow about every hour during the day, but the first crow in the morning breaks the tranquility of dawn, and the neighboring roosters crow in relay, which is impressive. Generally speaking, chickens sleep at night. Chicken has a "pineal gland" in its brain. The pineal gland can secrete a substance called melatonin. If light enters the eyes, the secretion of melatonin will be inhibited. Melatonin can inhibit the secretion of sex hormones and directly control the singing of birds. When the morning light appears, the secretion of melatonin is inhibited, and the rooster can't help but "Chen Si"; In a year, when the days get longer and the melatonin level in birds drops, they begin to call it spring. Grandpa carrying birdcage in the park also knows this truth. Usually, the bird cage is covered with a thick cloth cover. Once the cloth cover was removed, the light awakened the bird's "singing center" and the singing party began. In ancient times, roosters could enjoy dark and quiet nights. Sometimes, during the full moon, the moonlight occasionally stimulates the over-sensitive rooster to "get up at night". However, during the war, the probability of rooster crowing at night being disturbed by sound and fire is greatly increased, so the ancients regarded "rooster crowing at night" as a bad omen of war. In modern society, the popularization of artificial lighting has long eliminated the difference between day and night. Not only human beings are deeply affected by various health problems caused by the decline of melatonin levels caused by "artificial sunlight", but other animals that follow human beings are also deeply affected. Britain's national bird-Eurasian robin, commonly known as "robin"-is completely unknown now. According to the Royal Society for the Protection of Birds (RSPB), in many places they sing all night, which is caused by street lamps.
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