Fairy wrens: Accountants of the animal kingdom
Saturday, March 19, 2011 - 09:20
in Psychology & Sociology
A puzzling example of altruism in nature has been debunked with researchers showing that purple-crowned fairy wrens are in reality cunningly planning for their own future when they assist in raising other birds' young by balancing the amount of assistance they give with the benefits they expect to receive in the future...