What is the EVOLUTIONARY ADVANTAGE....

...of peahens preferring more flamboyant peacock tailfeathers.


It seems to me that peahens preferring peacocks who waste energy on this frivolous trait would have male offspring with less of a chance of surviving in the wild.  So please, explain to me the EVOLUTIONARY ADVANTAGE.

The evolutionary advantage is that it allows the identification Peacocks who have a lifestyle that allows them to grow well and stay safe, which both the peahen and their offspring can later share in.