dominants response to challenging subordinate. Cf. protest. See video. retreat Walk backwards quadrupedally. Subordinate pant-grunts to dominant, and occasionally walks backwards fearfully in front of him. Adult male walks backwards, facing estrous or semi-estrous female, to confirm her following him. Also in bonobos. Cf. creep. See video. retreat bipedal Walk backwards bipedally. Juvenile does rarely, in order to solicit play from partner following it. 9. See video. retrieve infant Nishida Recover. Mother returns to infant left alone or with others, touches, grasps or transports it, in order to depart, groom, suckle, etc. R 15 reunite Occurs after infant emits distress calls, when danger threatens, or when mother wants to depart. Also in bonobos. See video. return infant Alloparent returns infant to mother, when infant emits distress calls. Absent