Swallows Shed New Light on Looks vs. Testosterone
Category: barn swallow
A new study of barn swallows has shed a fascinating light on the link between their appearance and the levels of sexual hormones in their bodies. Scientists have long noted that male swallows with deeper red throats attract more females and have higher levels of testosterone. Conventional scientific wisdom always just assumed that swallows born with more testosterone had deeper throats and thus attracted more females. Turns out, however, that this is only partially true.
Posted by Benny Bleiman at 3:15 PM • 5 Comments • 0 TrackBacks
