Chicken | 台北市立動物園資訊網

Thechicken(Gallusgallusdomesticus),asubspeciesoftheredjunglefowl,isatypeofdomesticatedfowl,originallyfromSoutheasternAsia.Roosterorcockisa​ ...

Domesticated species of bird

The chicken (Gallus gallus domesticus) is a domesticated junglefowl species, with attributes of wild species such as the grey and the Ceylon junglefowl[1] that are originally from Southeast Asia. Rooster and cock are terms for adult male birds, 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. Humans keep chickens primarily as a source of food (consuming both their meat and eggs) or as pets. Traditionally they were also bred for cockfighting, which is still practiced in some places. Chickens domesticated for meat are broilers and for eggs are layers.

Chickens are one of the most common and widespread domestic animals, with a total population of 23.7 billion as of 2018[update],[2] up from more than 19 billion in 2011...