Chimpanzee Sanctuary Northwest

Hope. Love. Home. Sanctuary

J.B.

Annie and Missy

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Annie and Missy have such a strange relationship. They are nearly inseparable, but when Missy decides to groom or play with someone else, Annie appears to be jealous. Its very predictable – if you see Missy playing with another chimpanzee, you can bet that Annie is watching her every move from a distance. Sometimes Annie will sit back on her butt and tap her heels on the floor, which is a behavior she often displays when she is anxious. And while Missy likes to interact with the other chimps, Annie mostly keeps to herself when Missy is not around.

Today I was taking photos of Missy and Jamie grooming and playing together outside:

Jamie Missy groom platform OA resized_MG_5374

Jamie Missy play blanket brachiate OA resized_MG_5382

And sure enough, there was Annie in the doorway, keeping an eye on things:

Annie doorway to OA resized_MG_5368

Tool use

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Chimpanzees are famous for their ability to use tools, but some individuals are more skilled than others. We know that human talent is a combination of genetics, early life experience, and practice, and the same is true with chimpanzees, I believe.

Jamie loves using tools. She could spend all day working on a project. I don’t think she’s as interested in the end result as she is in the process. Sometimes, when we are serving food, we accidentally drop a few pieces on the floor outside the enclosure. Jamie will spend the rest of the mealtime working to get those pieces, even though her caregivers are still giving out food.

Burrito, on the other hand, is just not a tool user. He has very limited patience, and he doesn’t seem to get that same flash of insight that spurs chimpanzees like Jamie to go fetch an appropriate tool. This doesn’t necessarily mean he is less intelligent. Most of the time, begging humans for help works just fine. But it does give you an idea why Burrito is not the alpha that he would like to be – Jamie is always one step ahead of him!

Greenhouse update

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I wish I had more progress to report, but the weather has been awful. Still, we’ve managed to start installing panels on the roof and we’ve nearly completed one wall. From the inside, the view is somewhat distorted but it lets in nearly all the light. We’re all excited for the chimps to have more space in the winter. Now all we need is some sun!

web greenhouse construction one wall complete from outside outdoor area IMG_0635

web greenhouse construction one wall complete outdoor area from inside IMG_0632

Foxie and Jamie playing with Diana

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The other day, Diana was playing chase with Foxie when Jamie decided to join in on the fun. Many of the chimps at CSNW will wear clothing when they are feeling playful. In this video, you’ll notice Jamie tying a sarong around her waist just before she invites Diana to chase her.

Chimpanzee Strength

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As a follow-up to the last post, I thought I’d share this article that I came across last spring regarding chimpanzee strength. Judging by your comments, you either think that Burrito is incredibly strong or that I am incredibly weak. I choose to believe the former.

Honestly, I can’t think of a human on this planet who could compete with a chimpanzee in terms of sheer strength. And yet, after all these years being around chimps, I’ve never really understood why this is. Sure, they are more muscular than most humans, but that doesn’t seem to be enough to explain such a dramatic difference in power.

There are two explanations that I’ve come across, and they both seem plausible (and they are not mutually exclusive). The first says that the chimpanzee’s greater strength is due to a difference in “musculoskeletal architecture”, meaning, basically, that their muscle fibers and the geometry of the attachments between muscle and bone are different than ours. Have you ever wondered how a 150-pound deer is able to gracefully leap over garden fences on those scrawny little legs? When you think about how powerful some animals can be with such small muscles, you start to realize that size isn’t everything. But the second explanation, available in detail from the link above, says that humans simply have more “cerebral inhibition” over muscle control. Basically, our brains limit the extent to which we can use our own muscles.  Only once in a blue moon do we hear of someone using all of their available strength, and only in times of severe stress – for example, stories of mothers lifting cars when their children are trapped underneath (just an example, I don’t know if that’s actually ever happened!). Chimps, on the other hand, go full-bore all the time, making tog-o-war with their human caregivers a short-lived game.

Anyway, I’m in no position to evaluate either explanation, but its interesting to think about.