The Most Beautiful Peacock Dance Display Ever - Peacocks Opening Feathers and Bird Sound HD Peacocks are large, colorful pheasants typically blue and green and known for their iridescent tails. These tail feathers, or coverts, spread out in a distinctive train that is more than 60 percent of the birds total body length and boast colorful "eye" markings of blue, gold, red, and other hues. The large train is used in mating rituals and courtship displays. It can be arched into a magnificent fan t