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List of chicken breeds

There are hundreds of  chicken   breeds  in existence. [1]   Domesticated  for thousands of years, distinguishable breeds of chicken have been present since the combined factors of geographical isolation and  selection  for desired characteristics created regional types with distinct physical and behavioral traits passed on to their offspring. [2] The physical traits used to distinguish chicken breeds are size,  plumage  color,  comb  type, skin color, number of toes, amount of feathering,  egg  color, and place of origin. [1]  They are also roughly divided by primary use, whether for eggs, meat, or ornamental purposes, and with some considered to be dual-purpose. [1] In the 21st century, chickens are frequently bred according to predetermined  breed standards  set down by governing organizations. The first of such standards was the  British Poultry Standard , which is still in publication today. [3] [4]  Other standards include the  Standard of Perfection , the  Australian Poultr