Peacock, also called peafowl, any of three species of resplendent birds of the pheasant family, Phasianidae (order Galliformes). Strictly, the male is a peacock, and the female is a peahen; both are peafowl. The two most-recognizable species of peafowl are the blue, or Indian, peacock (Pavo cristatus), of India and Sri Lanka, and the green, or Javanese, peacock (P. muticus), found from Myanmar (Burma) to Java.
In blue and green peacocks, the male has a 90–130-cm (35–50-inch) body and 150-cm (60-inch) train of tail feathers that are coloured a brilliant metallic green. This train is mainly formed of the bird’s upper tail coverts, which are enormously elongated. Each feather is tipped with an iridescent eyespot that is ringed with blue and bronze. In courtship displays, the cock elevates his tail, which lies under the train, thus elevating the train and bringing it forward. At the climax of this display, the tail feathers are vibrated, giving the feathers of the train a shimmering appearance and making a rustling sound.
