Comments on: Orangutans: Geographic Variation in Behavioral Ecology and Conservation http://primatology.net/2009/02/24/orangutans-geographic-variation-in-behavioral-ecology-and-conservation/ We ain’t monkeyin’ around here. Fri, 10 Feb 2012 13:32:58 +0000 hourly 1 http://wordpress.com/ By: DDeden http://primatology.net/2009/02/24/orangutans-geographic-variation-in-behavioral-ecology-and-conservation/#comment-9899 Mon, 06 Apr 2009 19:32:48 +0000 http://primatology.net/?p=442#comment-9899 Hello. I’m wondering, has any gorilla, orangutan, siamang or gibbon ever been seen using a stone as a tool to pound nuts or other objects?

I know that chimps (and humans and capuchin monkeys) do use stones, but I suspect the other apes never have (methodically). Does anyone have a reference regarding this? Thanks.

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