1, watch the head type: the male head type for the back of the child head, head pointed, and the head is slightly smaller, the female head type for the flattened, rounded, round head, and the male head is slightly larger;

2, watch the body type: the male body is thin, hair tight, good movement, sexual ferocity, the distance between the eye ring from the head of the distance is farther, the eyes are apparently small, the female body is fatter, the hair a little bit looser, not too mobile, the distance between the eye ring from the top of the head is closer, the eyes appear large;

3, lying bar posture: the male is standing on the bar, head erect, and appear to be strong and healthy.

3, lying on the bar posture: the male bird on the bar for the standing position, head erect, and show athletic, female birds lying on the bar for the lying style, stepping on the bar, docile;

4, watch the tail feather tip: the male bird's tail feather tip for the tip of the type, the female's tail feather tip forks for the W-type. The male tail feathers are V-shaped;

5, touch the cloaca: the male cloaca performance between the pubic bone spacing is small, and the performance of the emerging protrusion, that is, pointed, the female cloaca for the two pubic bone spacing between the two large, especially adult birds, a middle finger can be stretched into the middle finger, and flattened, there is no protrusion.