The phrase "Classic Indigo Chin Thirteen Mouths Shout" does not have a clear origin and meaning, so it is difficult for me to provide a detailed introduction. It may be some Internet slang or colloquial slang, but there is no exact definition.
Indigo Chin is divided into red and blue. The main food is insects, such as locusts, stink bugs and ants. In addition, they also eat a small amount of wild fruits and weed seeds. Breeding occurs from April to June. The nest is oval-shaped and consists of weeds, dead leaves, fine roots, etc., with an entrance and exit on one side. The nest is padded with fine grass and fibers, and the nest is placed among the grass on the ground. There are 4 to 5 eggs in each nest, and the egg shells are slightly grayish blue-green, or have reddish spots.