The reason why white -faced mountain spargies do not hatch eggs

The white -faced sparrow may not hatch eggs because they were frightened.This bird can breed a 1-2 nest a year. The first nest starts from April, and the second nest will wait until mid-late June.It will choose the nest in a natural tree hole, with a cup -shaped as a whole, with moss and ground clothes outside, and there will be some animal hair and feathers inside.This bird can produce 6-9 eggs per nest. After 15 days, the chicks will hatch.