Chimpanzee grooming vocalizations fall into a few broad categories. Generally speaking, you’ve got your teeth clackers, your lip smackers, and your raspberry blowers. But within those categories, every chimp’s vocalization is unique. Some are quiet, with the lips just barely touching as if they are whispering. Others are quite loud – I can often hear Willy B’s teeth clacking during the morning grooming sessions through the security camera system audio.
Each chimpanzee has a different style of grooming, as well. Terry likes to do two things: 1) gently brush your skin with his fingers, and 2) try to pull individual hairs out of your arm. Our safety rules prohibit us from allowing the chimps to use two hands while grooming us, so Terry is forced to try to pluck our hairs by grasping them between his index and middle fingers. Luckily for us, it’s not very effective.
For chimps like Terry, grooming seems to be more about spending quality time with chimp and human friends. For Honey B, on the other hand, it’s all about picking scabs and drawing blood. She gets frenzied when she sees something to pick at, and she will continually direct you to turn your arm or present a different body part until she finds something good. I actually feel bad disappointing her when I haven’t injured myself recently. Honey B is the reason why we sometimes turn around and wonder how someone got in a fight without us hearing a sound. Where did all those wounds suddenly come from? Turns out Dr. Honey B was on duty and she opened every nearly-healed scrape and scab on one of her friends!
I wish chimpanzees were always as gentle as Terry is in this video as he tries to shoo away the third wheel at his grooming party.
