Why do male pigeons always occupy the nest

The male pigeons always occupy the nest because the mother pigeons are about to produce eggs. The male pigeon rely on this method to guide the hen pigeons, and at the same time, he can also swore the territory.This bird breeds about 8 times a year. Two eggs will be produced each time. After the incubation of 18-19 days, the pigeons will break out of the shell. After that, the pro-bird will secrete pigeon milk and use it to nurture small pigeons.On the fourth day after the shell, the young pigeons can open their eyes, but after two months of nurturing, they can leave the nest.