play. Often accompanied by play-pant at Mahale and Gombe. Seen in bonobos of Wamba. See also circle orthograde. 2. See videos. clack teeth Goodall Teeth-clack: Mouth rhythmically opened and closed during grooming. The teeth are clapped together each time the mouth is closed. Usually the lips are quite tightly drawn over the teeth when the mouth is open. Occurs during vigorous grooming. See also sputter, and smack lip. Not seen in bonobos of Wamba. 5. See video. clamp elbow Goodall Elbow clamp: When small infant pesters mother for food, she may clamp it to her breast with both elbows and continue her meal over its head. See also fend. Cf. cover nipple. 5. clap hand Koops and Matsuzawa Hand clapping. Unhabituated adult female of Nimba Mts. once observed