The American Standard of Perfection is the official breed standard for the poultry fancy in North America. First published in 1874 by the American Poultry Association, the Standard of Perfection (commonly referred to as "the Standard") classifies and describes the standard physical appearance, coloring and temperament for all recognized breeds of poultry, including chickens, ducks, turkeys, and geese.
The Standard is used by American Poultry Association judges at sanctioned poultry shows to judge poultry, and by those who participate in the competitive showing of selectively bred birds that conform to the standard, which led to the term "standard bred" poultry.
The first edition of the book listed 41 breeds, and today's versions have nearly 60. There are 19 classes of poultry recognized by the American Poultry Association. Eleven of these classes are devoted to chickens, of which six are classes of large breeds and five are bantam classes. There are four classes of ducks and three classes of geese, both divided by weight. All breeds of turkeys are grouped into one class.
Standard: American, Asiatic, Continental, English, Mediterranean, All Other Standard Breeds
Bantam: Single Comb Clean Legged (SCCL), Rose Comb Clean Legged (RCCL), All Other Comb Clean Legged (AOCCL), Feather Legged, Game Bantam
Duck: Heavy, Medium, Light, Bantam
Geese: Heavy, Medium, Light
Turkeys