The chicken (Gallus gallus domesticus) is one of the most common and widespread domestic animals, there are more chickens in the world than any other species of bird. It is estimated that more than 50 billion chickens are reared annually. In the UK and Ireland adult male chickens over the age of 12 months are primarily known as cocks, whereas in America, Australia and Canada they are more commonly called roosters.
See also:
Black Copper Maran; Brahma Chicken; Maran chickens; Mille-fleur booted bantam; Polish Chicken - White crested black polish rooster; Rhode Island red; Scots dumpy chicken; Sebright Bantam Chicken; Silkie Chicken; Sussex chicken; Transylvanian naked neck chicken
