Indigo-chin, scientific name is blue-throated songbird (uscinia svecica). Indigo chins are blue in spring and red in autumn. The blue indigo chins in spring look particularly beautiful because of their gorgeous wedding feathers, and they inhabit bushes or reeds. The Indigo Chin is named after the blue feather ring on its chest. When selecting a bird, the color of its throat and chest are often used to evaluate its quality. The feathers on its chest are mostly ring-shaped, and are divided into blue, white, black and crimson ( crimson originally refers to bright red, here it refers to crimson, this crimson is actually what the common people call purple). Indigo chins vary in appearance, change and are different from each other. More rings are better, white feathers are better, black feathers are worse.
The ancients made a list of the bird's appearance, which is known as one hundred and eight, but unfortunately most of them have been lost. According to the matching of different colors of ring feathers on the chest, they can be roughly divided into:One piece of purple, one piece of jade, one piece Blue, a piece of iron (is a piece of jet black, which I heard from my predecessors and never seen before.) There are also three crimson rings, five rings, three rings surrounding the moon, five rings holding the moon, etc. The nine rings are the three white rings.
