hens

 chicken, ( Gallus gallus ), one of the more than sixty species of poultry that does not come from the red deer ( Gallus gallus, family Phasianidae, Order Galliformes ) of India. Chickens are probably the most common domesticated poultry, raised all over the world for their meat and eggs. Despite the chicken's close relationship with the red junglefowl, there is evidence that the gray junglefowl (G. sonneratii) of southern India and other species of forest, as well as those Gallus group, may be involved in the bird race. There is debate about what the scientific name for the chicken should be. Although most taxonomists and ornithologists consider it to be a domesticated species of red deer, some classify it as a species of red deer (ie G. gallus domesticus), while others, including the United States Department of Agriculture, classify the bird as G. domesticus. Britannica Quiz Animals: fact or fiction? History  chicken  Chickens have a round shape. They are less than 70 cm (27.6 in