A peacock is significantly more colorful than a peahen and has a much larger tail. These traits allow the peacock to attract a mate but also make the peacock more visible to predators. This is an example of

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The traits of being colorful and having a large tail in peacocks are a classic example of runaway sexual selection, where traits that confer no survival advantage can become exaggerated purely through mate choice. This can happen because the preference for the trait becomes linked to the trait itself, leading to a positive feedback loop where individuals with even more extreme versions of the trait are preferred.

A Peacock Is Significantly More Colorful Than a Peahen and Has