Chimpanzee Sanctuary Northwest

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vocalizations

Chimp-Specific Vocalizations

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Chimpanzees have a variety of vocalizations: some to warn their group members of potential danger, some when they’re excited, some when they’re anxious or scared, some when they’re happy, playing, or greeting someone… In the captive world, the chimpanzees also use vocalizations to express their specific needs/wants to their caregivers. As CSNW caregivers, we have been conditioned to know what certain vocalizations are, based on who they come from and what the context is.

For today’s blog, I have compiled 6 of the top sounds you would hear from our chimp residents and I explain their special meaning.

Enjoy!

Grooming with Terry

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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.

Priorities

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The rain pounds the metal roof above in a deafening roar. Bolts of lightning streak across an ominous sky. Thunder cracks just overhead, shaking the building to its very foundation. This could be how it all ends.

Mmmmm, but this night bag…

Mave’s certainly got her priorities straight. There’s some interesting research dating back to the ’70s showing that primates often overreact to perceived dangers when they are young, and only with the help of those around them do they learn to narrow their alarm calls to specific threats such as predators. Perhaps Mave never got that lesson, as she is the only chimp at CSNW that reacts in such a sustained and exaggerated fashion to thunder. But I can’t blame her. Fortunately for Mave (and our poor dogs), thunderstorms are relatively uncommon here in Central Washington.

A snake in the garden

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The intensity of a snake alarm call is usually proportional to the snake’s size and proximity to the chimps. Basic alarm calls mean a snake has been spotted. Screams mean it is an imminent threat. But you have to recalibrate your understanding of snake calls when Annie is involved because to her, every snake is an imminent threat.

Even if it is a tiny garter snake, taking a nap on a grape vine well outside of the chimps’ greenhouse enclosure.