25 Aug
2007

In order to determine if other primates also use special vocalizations while interacting with infants, scientists studied a group of free-ranging rhesus macaques, which live on an island off the coast of Puerto Rico. They studied the vocalizations exchanged between adult females and observed that grunts and girneys increased dramatically when a baby was present. They also observed that when a baby wandered away from its mother, the other females looked at the baby and vocalized, suggesting that the call was intended for the baby........