Photo of Our Pet Bird "Mau" on a wire by Saqib Iqbal Digital.Normal grey cockatiel is the original cockatiel of all cockatiel color mutations. They mostly have grey plumage and round patches of orange color.Normal Grey CockatielAll types of cockatiel parrots are cockatiel color and genetic mutations, excluding the normal grey parrots.Therefore, the system of cockatiel mutations starts to form the normal grey cockatiels that show wild type color. It’s also, Cockatiels mutation with beautiful Cockatiel colors. 