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: a large male bird that has a very long bright blue and green tail that it can lift up and spread apart like a fan
Full Definition of PEACOCK
: a male peafowl distinguished by a crest of upright feathers and by greatly elongated loosely webbed upper tail coverts which are mostly tipped with iridescent spots and are erected and spread in a shimmering fan usually as a courtship display; broadly:peafowl
Any of three species (family Phasianidae) of resplendent birds of open lowland forests. Blue, or Indian (Pavo cristatus), and green, or Javanese (P. muticus), peacock males are 35–50 in. (90–130 cm) long and have a 60-in. (150-cm) train of metallic green tail feathers tipped with an iridescent eyespot ringed with blue and bronze. The train is erected, fanned out, and vibrated during courtship. Females (peahens) are duller and have no train. The male forms a harem of two to five hens, which lay their eggs in a depression in the ground. The blue and green male Congo peacock (Afropavo congensis) has a short rounded tail; the reddish and brown hen has a topknot.