Wing bands are preferred by many breeders as they don`t lose them as easily as leg bands and they stay ledgible longer. I breed exotic gamefowl and it is common among gamefowl breeders. Many breeders, buying birds to add to their program will not accept birds with no ID band. Even new bands are suspect. What it means is that the breeder keeps good records and cares about the lineage and quality of their birds.