127 nut cracking See hammer nut. nut-hammer See hammer nut. nuzzle Goodall Nuzzle: The young infant, until about 3 months old, moves its head from side to side and up and down against the mothers body when searching for the nipple Termed rooting behavior in other mammalian species. Kanos Nuzzle in bonobos. N O object play See play with object. Odzala Study area of Pan troglodytes troglodytes in Odzala National Park, Republic of Congo. Research done by C. Devos and colleagues in 2001. offer arm Dominant individual extends arm for subordinate to mouth, to be reassured, or to be groomed. Absent in bonobos of Wamba. 5. See video. offer back Present back to solicit grooming of it. 2. See video. O Okorobiko Study area of Pan troglodytes troglodytes