grunt, food Uttered during or just before eating, especially during first minutes. Cf. aha-grunt. Bonobo give similar grunt. See video. grunt in bed Goodall Nest grunt: Distinctive double grunt given when an individual begins to look around for a suitable nest site, during nest making, or as he settles down for the night. Same as Boeschs Night call? Not heard in bonobos of Wamba. 5. G H H habituated No overt response to stimuli, after many repeated presentations that earlier elicited some reaction. Chimpanzees of M group now act normally in human presence although they fled before habituation succeeded. See Fig. 18. Fig. 18 Habituated: Chimpanzees of M group are followed by researchers without any apparent influence on their behavior hair erection See bristle. 90 hammer nut with