Proximate causes of the red face of the bald uakari monkey (Cacajao calvus)
In social species, such as hp pavilion 15-eg1053cl primates, facial appearances transmit a variety of social signals.Although it is suggested that the intense red colour of the face of the bald uakari monkey might be an indicator of health, this hypothesis still has not been verified.This study describes the histological structure of the skin of th