What's the name of the black bird that represents the cock crow in the wheat day? Why does it only ring at the time of wheat harvest?

The real name of this blackbird is not clear, and the names vary from place to place. Zhoukou area is called red eyebrow tea, which is a beneficial bird. Specializing in insects and moths. It was common more than nine years ago, but it is rare now. When it crows for the rooster, before dawn, there is a legend that a long time ago, this black bird "red eyebrow tea" went out for food at dawn in summer and saw a cow pull a lump of shit with a few grains of food on it. Red eyebrow tea was overjoyed and quickly flew over. It just fell on the shit and was about to eat. Unexpectedly, another piece of cow dung fell and hit the red eyebrow tea, and then fell one by one, pressing the red eyebrow tea under the cow dung. I don't know how long it took. A rooster came and saw something to eat on this cow dung, so he scratched it with his claws. I found red eyebrow tea under cow dung, and the dying red eyebrow tea was saved. Thank you very much. I want to repay you. The rooster agrees that the summer night is too short, and the rooster doesn't know the time. After the agreement, the rooster crows (four times). After class four in summer, the rooster crows with red eyebrow tea instead of rooster. Red eyebrow tea chooses this time, one is gratitude, and the other is to remind companions not to eat cow dung to avoid accidents. This is why chickens crow instead of wheat. Later, roosters got used to crowing four times in any season, which formed the saying that chickens don't beat five watches.