How many days do the gray bird hatch eggs

Gray Bird's hatching is generally about 16-18 days.This bird is mainly distributed in some countries in Southeast Asia, but many places have been introduced as cage nourishing birds, and there are also breeding in southern my country.It usually chooses a shine or trees in the wild. It can breed 4 times a year and can produce 4-7 eggs each time.After the young birds broke the shell, after 15 days, the feathers were probably growing, and a nest can be released after one month.