The chicken (gallus domesticus) is a domesticated junglefowl species, with attributes of wild species such as the grey and the ceylon junglefowl that are originally from southeastern asia. rooster or cock is a term for an adult male bird, and a younger male may be called a cockerel. a male that has been castrated is a capon. an adult female bird is called a hen and a sexually immature female is called a pullet. originally raised for cockfighting or for special ceremonies, chickens were not kept for food until the hellenistic period (4th–2nd centuries bc). humans now keep chickens primarily as a source of food (consuming both their meat and eggs) and as pets. chickens are one of the most c...

Source: Wikipedia