does not respond to others pant-grunt. Goodalls Ignore includes both ignore and snub. Kanos Ignore for bonobos. Cf. snub. See videos. I imaginary play See play, imaginary. imitate Goodall Imitation When one chimp, after watching the behavior of another, then does the same. See video. immature Age-class consisting of infancy, juvenility and adolescence. immerse See dunk. immigrate Adolescent female leaves natal group to enter neighboring group for reproduction. Immigrant usually welcomed by males, but threatened by adult and adolescent females of new group. Juveniles inspect immigrant. See transfer. See video. immobilize Two or more attackers restrain single mature chimpanzee, using hold. Tactic used in lethal coalitionary attack on victim. Behavior includes hold, pull, bite. Recorded or suspected to occur at Gombe, Mahale, and Kanyawara. Cf. press down. 5.