Peafowl

Peafowl are two Asiatic and one African species of flying bird in the genus Pavo of the pheasant family Phasianidae, best known for the male's extravagant eye-spotted tail covert feathers, which it displays as part of courtship. The male is called a peacock, the female a peahen, and the offspring peachicks. The adult female peafowl is grey and/or brown. Peachicks can be between yellow and a tawny colour with darker brown patches or light tan and ivory, also referred to as "dirty white". The term also embraces the Congo Peafowl, which is placed in a separate genus Afropavo.In common with other members of the Galliformes, males possess metatarsal spurs or "thorns" used primarily during intraspecific fights.White peacocks are not albinos; they have a genetic mutation that is known as Leucism, which causes the lack of pigments in the plumage. Albino animals and birds have a complete lack of color and red or pink eyes while White peafowl have blue eyes. The white color appears in other domestically bred peafowl but in different quantities. Chicks are born yellow and become white as they mature, according to the Peafowl Varieties Database. Indian peafowl of all colors, including white, have pink skin.The species are:As with many birds, vibrant iridescent plumage colours are not primarily pigments, but structural colouration. Optical interference Bragg reflections, based on regular, periodic nanostructures of the barbules  of the feathers produce the peacock's colors. Slight changes to the spacing result in different colours. Brown feathers are a mixture of red and blue: one colour is created by the periodic structure, and the other is a created by a Fabry–Pérot interference peak from reflections from the outer and inner boundaries. Such structural colouration causes the iridescence of the peacock's hues since unlike pigments, interference effects depend on light angle.Colour mutations exist through selective breeding, such as the White Peafowl and the Black-Shouldered Peafowl
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