at Gombe, Mahale and Bossou. 5. See video. drink from lake Chimpanzees of lakeside groups, B, K, M, N, and L groups, drink from Lake Tanganyika. Some afraid of high waves and do not do so. Category 1. See video. drink from stream Chimpanzees of Mahale mostly depend on streams and rivers for drinking water. See video. drip Juvenile male, Xmas, once dribbled water repeatedly from back of hand at pool. Solo play with water. 9. See video. drop 3 drop Let object fall, occasionally deliberately onto another individual or human observer. See video. drop bark bits Remove by hand without obvious purpose outer bark little by little and drop. Shown by nervous individual or when waiting for companion engaged in long bout of sleep, grooming, or fishing