Why do pea starlings crow at night?

Courtship period According to the life habits of the cuckoo in the animal encyclopedia, the pea starling is a kind of cuckoo. The cuckoo keeps calling at night because it is in the courtship period and needs to attract the opposite sex to mate with songs. Cuckoo is withdrawn by nature and often acts alone. Flying is fast and powerful. When flying, the wings vibrate greatly, but there is no sound.