Orangutans are primate-eaters too

Adam Khor

They dine on slow lorises once in a while.

http://www.newscientist.com/article/dn21364-vegetarian-orangutans-eat-worlds-cutest-animal.html

Interestingly the slow loris is a poisonous primate. It produces a toxic substance from glands on its elbows and then licks its elbows (try doing that!) and spreads it all over its fur. Because it licks it, it also gets a toxic bite, which can cause swelling, pain and even severe allergic reactions to humans.