Why does the peacock have such an elaborate tail? This cumbersome trait significantly decreases the male's chances of survival. It only exists because it confers an advantage to its bearer in the form ...

(Listen to this post, or right-click to download mp3.) "Some guys have all the luck. Some guys have all the pain." -- Song lyrics Last time we saw thaton many traits, males are generally more variable ...

Male animals are subject to stronger selection pressures than females, which may allow populations to adapt to environmental change more efficiently. Male animals are subject to stronger selection ...

related to environmental variation. To understand the adaptive value of cooperative breeding behavior in variable environments, researchers must consider both mean and environmentally induced variance ...

(Listen to this post, or right-click to download mp3.) "Some guys have all the luck. Some guys have all the pain.