Does chimpanzee feels grief when some other member dies from their group?

does chimpanzee feels grief when some other member dies from their group?How do they show their grief for how long?|||Jane Goodall, who is likely the most well-known and most experienced chimpanzee researcher of our time, if not ever, has said yes, they do. And they certainly do seem to act upset when a friend dies. The scream, stay near the body, refuse to eat, etc. However, there is no good way to measure animal emotions scientifically. No one can ask a chimp if he is, in fact, depressed, or why. Emotions are hard, if not impossible, to measure without words. So no one can conclusively say, this chimp is feeling this emotion, because we can't get inside their head and really know what's happening in there. But, we can look at behaviors and speculate, and it does seem that they certainly might grieve not unlike we do.|||of course they do. ask Obama.