In birds, wattles are often an ornament for courting potential mates. Large wattles are correlated with high testosterone levels, good nutrition, and the ability to evade predators, which in turn indicates a potentially successful mate.
Among birds, wattles often serve as a visual signal to attract potential mates. In males with larger wattles, there is typically an increase in testosterone levels, access to nutritious food, and enhanced survival capabilities, all of which can indicate a more desirable partner.