How to choose the best yellow bird

If you want to choose the best yellow bird, you need to pay attention to several aspects.The first is its length, from the tip of the mouth to the tail tip of at least 12 cm.Secondly, it depends on the body, mainly check whether symmetry.Then look at the tail, it is best not to split.It also depends on the feathers on the head. The feathers must be clean, preferably numb.Finally, it depends on the feather color, and the color is pure.