Why does the rooster crow?

It is common for a rooster to crow and lay eggs. In many cultures, rooster crowing is associated with the arrival of the morning, which seems to imply that the rooster can know the time. Why does the rooster crow? And usually in the morning? Now let's take a look at why the rooster crows.

Why does the rooster crow?

Rooster crowing is an instinctive response to light stimulation, which is controlled by internal biological clock and hormone, but external light and sound stimulation can also induce rooster crowing, and the effect of external stimulation on rooster crowing is also internally controlled by rooster. The chicken has a "pineal gland" in its brain that secretes melatonin, and when melatonin levels drop, the chicken will bark. Most birds are night blind, and chickens are no exception. Generally speaking, chickens sleep at night. Only when the pineal gland is invisible can melatonin be secreted. If the light shines into the eyes and the morning light suddenly appears, the secretion of melatonin is inhibited, and the rooster can't help but "Si Chen".

Singing reflects the level of testosterone.

A chicken is a social animal, especially a rooster as a parent. It always has a lot of family chores to deal with and a lot of command and decision-making tasks. For example, when a rooster finds food, it makes a cry for his wives and concubines to come and share. If you find something as delicious as earthworms or beans, the frequency of its calls will be higher. On the contrary, when a rice grain with low attraction is found, its calling frequency will be lower.

Some hens also crow.

Some hens also crow, or when the hens are injected with androgen, the hens will begin to crow. This is because only the ovary and fallopian tube on the left side of the hen develops, while the one on the right remains undifferentiated. If its left ovary fails, the undifferentiated ovary on the right develops into testes and produces androgens. At the urging of androgen, hens can crow just like Roosters.