How to divide the mother -in -law and mother

The mother -in -law of Wuyu mainly depends on four aspects. The first is the primary flying feather. The wings of the male are black, and there are obvious metallic luster.Secondly, you can look at the bird's beak. The color is more likely to be male, and the color of the mother is light.In addition, you can see through, if the first four or four squares, and the top of the head is wide, it means that it is a male bird.The last is to look at the station posture. Gong's standing posture is even more upright, and the mother's likes to squat.