Why do chimpanzees throw stones at trees?

ajanta

ajanta

Registered Senior Member
Newly discovered stone tool-use behavior and accumulation sites in wild chimpanzees are reminiscent to human cairns, report researchers. Chimpanzees are proficient tool-users, using sticks to fish for termites, to dip for ants, to extract honey, and even using stone or wooden hammers to crack open nuts. Outside the foraging context male chimpanzees sometimes throw branches and stones during displays, or leaf-clip to solicit sex from females. This research has therefore been fundamental for providing insights into natural chimpanzee behavior and most importantly into the differences between populations.

http://googleweblight.com/?lite_url...186848&sig=APY536ysy_hRW-I1kQX8pSQKSo8IASbe7A
 
All Hominids have sophisticated brains and many display human abilities and emotions. They are just a simpler form of human, because their environment required fewer sophisticated skills to survive the test of natural selection. But they all can count, albeit in non-mathematical terms.
http://www.mytestdomain.dk/group-one/lemurs-can-count/

The Bonobo (a matriarchy) is the most hospitable society of all hominids. They offer food and sex to visitors from other families, and resolve personal conflicts with sexual activity..a true *love generation*.
In a test performed in Holland a group of Bonobos far outperformed a similar group of Common chimps in solving problems to receive rewards..
While the Common chimps were haggling for leadership, the Bonobos cooperatively solved one test after another and finished far ahead of the others. Remarkably they always shared the rewards with each other.

I believe the native humans call the Urangutan, the *tree people*.

Koko, the Gorilla has a vocabulary of some 1000 words and named her striped Manx baby kitten, "All Ball" . Without a tail a small manx kitten looks like a ball, our own Manx loves to roll around on her back. It was a *well-chosen* name.
When All Ball died (was run over by a car) and her handlers had to explain the situation, Koko was heartbroken and constantly signed the words expressing her grief. At night she could be seen staring out the window and softly moaning. Commercially we kill them to sell their hands for ashtrays...for shame.
 
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Why they do it? rTo show off their skill, of course. The same reason little boys used to walk on top of stone walls, or do wheelies on their bicycles. (Now, they just buy more cosmetics.)
 
No hesitation, no experimenting - she's done this before.
Actually, watching both orangs and chimps with fabric, you can't help seeing their humanity: they do exactly what anyone would with a scarf, a sheet or a blanket.
 
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