The reason for embroidered eyes without hatching eggs

The embroidered eyes may not hatch because the eggs are moved or stained with other odors.This kind of bird has started its nest since March, and it usually builds the nest on broad -leaved forests or coniferous forests. The shape is hanging basket or cup -shaped.With the help of the environment, it can be shielded.After the nest is built, it can lay eggs. Usually it can be breed twice a year. Each time is 3-4, the appearance of the egg is blue-green or white.