How does Huang Yan divide the father and mother

Huang Yan's mother -in -law should look at three aspects.The first is the color. The feather color of the male bird is golden yellow, which looks very bright, and the color of the mother bird is yellow -green.Followed by body shape, the mother bird's body is wider, and the male bird is thinner.In the end, there are some subtle differences. For example, although the back of the male bird is yellow, it also has light dark green, which looks not obvious, while the mother bird is the opposite.