What do the red 'ornaments' of female macaques mean?

(CNRS) Scientists demonstrated that, contrary to what had been assumed for several years, colour variations among female macaques do not precisely indicate the time of ovulation. On the other hand, dominant female macaques, who usually have greater reproductive success, have darker hindquarters.

from EurekAlert! - Social and Behavioral Science https://ift.tt/2JFWkBA