How to divide the mother and mother

Gray Birds can be seen from three places, as most of the birds.The first is the mouth. The male bird's mouth has a certain arc, and the mother bird is relatively flat.Secondly, you can look at its eye circles. There is a circle of red around the eyes of the male bird, and the eye circles of the mother bird are not complete.In addition, the rock of the mother bird is very short, it sounds better than the male bird.This bird is usually paired or small group activities, and most of them eat grass and fruits.