chimpanzees See respond to predator. pregnancy Females in last stage of pregnancy often lie prone, rest, and travel alone. Pregnant female often recognizable from large belly. Cf. travel alone after childbirth. See gestation period. P presbyopia Farsightedness from aging presumed from greater distance old chimpanzee maintains from body part that he/she is grooming. See video. present for grooming See solicit grooming. present with limbs extended Normal quadrupedal stance with hindquarters directed to dominant chimpanzee. Goodalls Present, also Rump-turn. Plooijs PRE. van Hooffs Mount-present. Kanos Dorso-ventral presenting for bonobos. Bonobo females also show ventro-ventral courtship gesture. See video. present with limbs flexed van Hooff Crouch-present. Quadrupedal posture with limbs flexed, and hindquarters turned towards another. Differs from crouch, in which hindquarters not directed to partner. See video. press 141