Peacock feathers are the colorful plumage of the male peacock, a bird known for its striking appearance. These feathers are primarily used during courtship displays to attract females. The most recognizable feature is the eye-like patterns, called "ocelli," which can be vibrant shades of blue, green, and gold. The feathers are made of a protein called keratin, similar to human hair and nails. Each feather can be quite long, reaching up to 5 feet in some species. When fanned out, they create a stunning visual effect, showcasing the peacock's health and vitality to potential mates.