09/16/2024
Let’s start at the top shall we? It’s a familiar, practically iconic, image. A group of primates, huddled together, grooming one another. Delicately picking at, and stroking, the fur of a companion and popping the occasional tasty morsel into their mouths. But what purpose does it serve? This allogrooming, or tending to the pelt of a member of the same species, is certainly social, used to indicate dominant social structure as well as to help fend off disease from germ-carrying parasites or ticks. But there are other, more surprising benefits. In macaques, this sort of attention has been shown to reduce heart rate and alleviate stress, while a study of vervet monkeys has shown that grooming helps to insulate their fur by fluffing it up like a duvet.