The original publication mentioned in the video from Frontiers in Ecology and Evolution is called: Foraging strategy and tree structure as drivers of arboreality and suspensory behaviour in savannah-dwelling chimpanzees. Click here for the link to the publication.
Click here for one popular science translation of the study: Walking on Two Legs May Have Evolved in Trees, Not on the Ground.
There’s more to the study than the quick video above. It includes discussion of the type of habitat in Tanzania where the study chimpanzees live. Unlike the dense forest ecosystems where many chimpanzees live, the habitat of the site in Tanzania is called savanna-mosaic, which always strikes me as poetic or romantic or something. It’s thought to be similar to the type of ecosystem where early humans adapted to thrive.
I was talking about the study with J.B., and that conversation caused me to think about studying chimpanzees in order to learn more about humans or human origins.
I’ve definitely said it before, but it doesn’t hurt to reflect again on how and why chimpanzees have been bought/sold/traded by humans in the pet, entertainment, and biomedical industries. They are frequently thought of and used as stand-ins for humans, yet they are different and separate enough that humans tend to feel less moral obligation towards them.
Their likeness to us has been, all to often, to their detriment. I don’t think that’s the case in this particular study. I do find theories about early humans interesting. But I think it is the case in an update to another story that has been in the news.
A couple of weeks ago, I wrote a blog post sharing a sad update to the Tonia Haddix / Chimp Crazy saga. If you missed that update, you can read the full post here. Just two days ago, Haddix was finally sentenced to almost four years in prison for lying under oath that a chimpanzee named Tonka had died, when in fact she was secretly keeping him in her basement. She has not yet been charged for the second chimpanzee she was trying to hide just months ago.
Her lawyer made a statement that Haddix had a difficult upbringing and history with humans, so had turned instead to animals for comfort. I think it was clear in the documentary Chimp Crazy that she felt chimpanzees in particular filled a need she had, even referring to Tonka as being more of a human than a chimpanzee. If she saw evidence of that it was because the humans around him were attempting to assimilate him into their world, rather than seeing him for who he is.
Haddix is an extreme example of this warped vision, but it’s easy to slip into this view because chimpanzees are so similar to humans and so culturally and socially adaptive. Celebrating and understanding their differences is perhaps more important to helping them than seeing their similarities.
I hope we can do both.
