Peacock walking with open tail

peacock peafowl peahen plumage covert feathers retiro courtship displays retiro park bird avian phasianidae tail coverts ornithology plumes flapping courtship shakes feathers feather structural colouration oviparous phasianinae madrid courtship ritual colouration tail pavonini defence mechanisms mating wing territorial iridescent threat female breeding antipredator behaviour flaps garden intimidating pattern natural selection sexual selection vibrant vigorously eyespots