The eyespots have it after all | Science News



Support nonprofit journalism

Subscribe now


The eyespots have it after all

New experiments may reconcile conflicting studies regarding the peacock’s allure

11:35am, April 26, 2011

The tale of how the peacock got his eyespots has taken a new turn.

His shimmering train of feathers tipped with eye-shaped spots ranks among the most cited examples of what Darwin called sexual selection. In this singles-bar approach to evolution, flashy plumage and other ornaments arise not because they enhance survival of the fittest but because they favor reproduction of the sexiest.

Basic principles aren’t in doubt for the peacock exemplar. Yet “everybody uses it without knowing much about how it works,” says Roslyn Dakin of Queen’s University in Kingston, Canada.

Watching how peafowl courtship played out in three clusters of free-roaming birds, she found that shimmying a train with especially high numbers of eyespots did not — repeat, did not — seem to improve a male’s chances of dazzling a female into mating.

That disconnect flies in the face of a series of classic experiments on peacock courtship, Dakin a

This article is only available to Science News subscribers. Already a subscriber? Log in now. Or subscribe today for full access.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content