The reason why the crow does not hatch eggs

There are too many reasons why the crow does not hatch eggs. For example, the bird's motherhood is not good, it is frightened, and the egg has other scent.It is paired with the nest before breeding, and the nest is mostly built near the stream or the bank of the river. The materials are dead branches, grass, and fine roots, etc. It will be matched with feathers.Generally, each nest has 5-8 eggs. The eggs are gray-blue, green or gray-yellow, and there are purple-brown or gray-brown spots on it, which can be hatched after 18 days.