Cock crowing is controlled by internal biological clock, but external light and sound stimulation can also induce rooster crowing, but the influence of external stimulation on rooster crowing is also controlled by internal biological clock.

When the period of light and dark changes, roosters show the same time difference as people flying over a big time zone. This is because the biological clock of chicken, like that of human, is influenced by melatonin secreted at night (in darkness). At the same time, cock crowing is also related to chicken androgen. Capons and hens can't crow precisely because they don't have androgen. If they are injected with androgen, hens will also start to crow.

The cries of ordinary animals

Baa sheep?

Cleisthenes.-Cow?

Wang Wanggou?

Gaga frog?

Cicada.-Cicada?

Meow meow-a cat?

Hey.-Hey?

Gigi.-Chicken?

Ow.-Tiger?

Squeaking mouse?

Mm-hmm.-Donkey?