There was a time, long ago, when the birds of jungles were all adorned with gaudy plumage. In modesty the males changed their outfits for browns and grays each year after breeding season, as they had no desire to outshine the forest endlessly. The females were not so reserved. They kept their colors year-round, showing off their beauty to all. They would toss their heads and fluff out their feathers and bask in the sunlight filtering through the trees.
The unseen side of the females was one of insecurity and vanity. Preening and bathing, plucking every stray feather, they were never content to don a more muted coat. If ever she saw another more beautiful, a hen would retreat to solitude, primping and preening to resemble the other. So it came to be that they became more beautiful in their own eyes, but they shared that beauty with every other female bird in the jungle.
One year a mouse observed the males shedding their flashy colors for subdued