Chimps Groom Monkeys: Is This Pet-Keeping's Primate Past?

A recent study published in the journal Primates suggests that the roots of pet-keeping behavior may lie deep within our primate ancestry. Researchers observed two young chimpanzees, Ishe and Dembe, in Uganda, engaging in gentle grooming of a red-tailed monkey, an interaction rarely seen and not aggressive as typically expected.

This surprising behavior, alongside numerous other documented primate interactions with different species, indicates that humans may not be unique in seeking companionship. The study, led by Cyril Grueter, analyzed 427 entries across 88 primate species, finding that all exhibited behaviors that could be linked to pet-keeping, such as play, nursing, and grooming.

While these primate interactions are not direct equivalents of modern pet-keeping, they offer insights into the evolutionary 'ingredients' of such relationships. These behaviors, observed in both wild and captive animals, suggest that a fundamental tendency to bond with and care for other living beings might be more widespread in the primate world than previously understood.