Ornaments

Ornaments are traits that are used to attract mates based on physical attractiveness. These traits may help show good genes that potential mates may find desirable. Although these ornaments are usually the main strategy in order to procure a mate, they come with the cost of making the individuals more susceptible to being tracked by predators. The most notable form of ornaments comes in the ornate plumage that the peacock has in order to attract peahens; the brighter and bigger the feathers, the better chance of finding a mate.

https://en.wikipedia.org/wiki/Ornaments