Pearl chicken (Numididae) (guineafowl), also known as pearl chicken, mountain chicken, Guinea fowl. It is one of the families of chickens, native to Africa. There are three main types of species: one is the "big pearl chicken" distributed in Somalia, Tanzania. Its main characteristic is that it only has a few feathers with white dots on its back. The second is the "Crested Pheasant", which is found in the tropical forests of Africa. The third is the "gray-topped guinea fowl", which consists of two types: the blue-bearded guinea fowl and the red-bearded guinea fowl. The "Gray-topped Chicken" has been bred into many varieties such as the Gray Chicken, the White Chicken, the Mauve Chicken and the hybrids between them. Among them, the gray chicken is the largest breeding varieties, China is usually referred to as the pearl chicken mainly refers to the gray chicken type, such as the French Isha pearl chicken.