Negra is an introvert. While she enjoys the occasional grooming session or gentle play with the other chimpanzees, she chooses to spend the vast majority of her time by herself, usually under a blanket, napping or gazing out the window at the valley below the chimp house. As the grandma of the group, she sometimes has to tell the other, more rambunctious, chimps to settle down so she can have some peace and quiet.
It’s not unusual to catch Negra in pensive moments like this one.