Gray is the most exotic color category of ornamental pigeons in China, such as silver gray, bright gray, medium gray, tile gray, dark gray and dark gray. Tile gray is the middle color in the gray category, because it is close to the color of tiles and gray is heavier, so it is named. Big nose tile ash is a western variety, which is still raised in Xi 'an. Characterized by a big nose, a short mouth, bean eyes and pink eyelids. Henan called bean-eye tile gray as gray haha, and golden-eye tile gray as gray golden eye. Zhu Xiao's small drum nose is gray in Beijing and Tianjin, with a head like an abacus and a short body. The dark blue feathers on the head and chest are green and shiny, and the body is slightly dark gray, darker than the bright gray body color, with bean eyes and golden eyes. It is medium-sized and powerful.