How does the white waist bird divide the mother and mother

There are many ways to distinguish between white waist birds.First of all, you can look at its mouth. Generally, the mouth of the male is wider and shorter, and the mother is relatively slender.Secondly, you can look at its tail. If it is relatively slender, it means that it is a male bird, and the thicker is the mother bird.In addition, you can also look at the look of the birds. The male is often more energetic, the standing position is more upright, and the mother is timid and looks gentle.