The animal known for its elaborate tail feathers is the peacock. Male peacocks possess stunningly vibrant plumage that features a range of colors, including iridescent greens and blues, along with eye-patterned "tail" feathers called a train. This extravagant display plays a crucial role during mating rituals where males fan out their tails to attract females, showcasing their fitness and genetic quality. The peacock's tail feathers can be up to six feet long and are shed and regrown annually, making them a symbol of beauty and pride in various cultures worldwide.