Jun
18th
Wed
18th
Although female chimps will advertise that they’re in estrus (i.e., fertile) with a specific call, they only occasionally make noise during sex. In fact, if there are higher-status female chimps around or if they are mating with lower status-males (which was about two-thirds of the time in the study), female chimps are silent while mating. It’s only when they’re having sex with high-status males that they advertise that fact vocally.
