The peafowl or so called peacock can refer to the two species of bird in the genus Pavo. Peafowl are best known for the male’s extravagant tail, which it displays as part of courtship. The male is called a peacock, and the female a peahen. The female peafowl is brown or toned grey and brown. These the two species are Indian Peafowl ( Pavo cristatus,Asiatic) and Green Peafowl (Pavo muticus Asiatic). The Indian Peafowl is a resident breeder in the Indian subcontinent. The peacock is designated as the national bird of India and the provincial bird of the Punjab (Pakistan).
The Green Peafowl breeds from Burma east to Java. Green Peafowl is as vulnerable to extinction due to hunting and a reduction in extent and quality of habitat. On this picture is male Indian Peafowl’s plumage. The male (peacock) Indian Peafowl has iridescent blue-green or green colored plumage. The so-called “tail” of the peacock, also termed the “train,” is not the tail quill feathers but highly elongated upper tail coverts. As is seen on the photo, the train feathers have a series of eyes that are best seen when the tail is fanned. The specie has a crest atop the head. The Green Peafowl is different in appearance from the Indian Peafowl. The male has green and gold plumage and has an erect crest. The wings are black with a sheen of blue. Many of the brilliant colours of the peacock plumage are due to an optical interference phenomenon, Bragg reflection, based on (nearly) periodic nanostructures found in the barbules (fiber-like components) of the feathers. Different colours correspond to different length scales of the periodic structures. White (albino) peafowls are sometimes bred.