How to divide shellfish into male and female?

Methods of identifying the male and female of shellfish;

1, male scallops are generally large, with red hair on the shoulders and a high probability of crimson hair. The chin is black, with obvious "bench" legs and eight black belts. Mother's shoulder hair is white with little or no black spots.

2. The bigger the chin black spot, the closer it is to men, and vice versa. The one with a long tail and dark feathers is only male, and the other is female.

3, look at the lines of the black eight, if the two tails of the big black eight extend under the wings, the male is very likely; If the figure of eight is round, or even the tail of the black figure of eight is upturned, the mother is very likely.

4, look at behavioral characteristics, males like to stand on the top of their heads, their tails are active, and they are full of energy. The female looks quiet and docile.