Wise finches opt for the unisex look

时间:2019-03-08 04:09:22166网络整理admin

BIRDS often use colourful displays to attract mates, but sometimes it pays to be more discreet, according to researchers in Britain. Naomi Langmore of the University of Cambridge and Andy Bennett of the University of Bristol studied the antics of long-tailed finches in an aviary. Male and female long-tailed finches look alike and reveal their gender only through their behaviour. The researchers noticed that males kept their sex secret when confronted by a dominant male or a group of unfamiliar birds ( Proceedings of the Royal Society Series B, vol 266, p 543). By concealing their gender, the birds may avoid conflicts with rivals. “If a species lives in flocks, it could be costly to constantly have sexual harassment going on,