13795597 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee clings to a dead tree and uses his teeth to scrape rotted wood from the tree trunk.13795584 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An adult male chimpanzee peers closely at a leaf and grooms it intently. Leaf-grooming behavior when done alone may be a displacement activity.13795581 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Three male chimpanzees groom socially in a straight line. They use their fingers to part hairs and expose skin for cleaning.13795571 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Natural climbers, chimpanzees ascend easily up tree trunks.13795555 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee sits on a log in the forest observing his surroundings13795551 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Two resting male chimpanzees look toward an arriving chimp.13795548 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young chimpanzee wet with rain sits in a tree waiting for the chimps in his group.13795541 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Natural climbers, chimpanzees ascend easily up tree trunks.13795538 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Chimpanzee males are attracted to an estrous female resting high in the trees, some gaze up at her while others groom.13795598 - Africa, Uganda, Kibale National Park. Ngogo Chimpanzee Project. A male chimpanzee relaxes observing his surroundings as he is groomed.13795592 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Sitting with his companions, a male chimpanzee glances upward.13795590 - Africa, Uganda, Kibale National Park, Ngogo. Two male chimpanzees wait and listen for the rest of their group.13795589 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Observing his surroundings, a young adult chimpanzee expresses social excitement in his face and with a partial erection.13795587 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee sits leaning against a tree observing his surroundings.13795586 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee looks up into the trees.13795578 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild female chimpanzee chews dead wood from the trunk of a decaying tree.13795574 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young juvenile chimpanzee sits obscured by the vegetation chewing on a stick.13795565 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild juvenile male chimpanzee perched on the limb of a tree surveys his surroundings.13795563 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee sits listening and watching.13795561 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An infant chimpanzee climbs a vine.13795558 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An infant male chimpanzee experiments with elements of a charging display, using stomping and arm waving in hopes of a reaction.13795553 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee is on alert as other chimps arrive.13795552 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A playful and curious infant chimpanzee grips and chews a thin branch.13795546 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A juvenile chimp sits on a branch over a stream, his backside showing the remnants of his white tail tuft from infancy.13795540 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A relaxed female chimpanzee sits aloft in a mossy tree looking intently.13795536 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee grooms his female companion's leg while she relaxes cradling her sleeping infant.13795593 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee rests on a vine.13795582 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild, young adolescent male chimpanzee sits looking up into the trees.13795573 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A mother chimpanzee comforts her daughter who tantrums because she is in the process of weaning.13795562 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee sits in the vegetation observing his surroundings.13795539 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee stares, his face relaxed.13795537 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee lounges on a fallen log and looks into the treetops.13795596 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An adult male chimpanzee looks upward with interest.13795595 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An adult male chimpanzee traveling through the forest.13795580 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A female chimpanzee and her young juvenile offspring eat dead wood from a decaying tree trunk.13795567 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee sits on a path resting against a tree.13795560 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee glances upward13795559 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Communicating with other chimpanzees in the forest, a male chimp begins to pant-hoot.13795550 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young chimpanzee is alert and watchful of the adult male in front of him.13795549 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee wet from rain looks over his shoulder.13795547 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee sits on the bend of a tree dangling his feet.13795545 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A juvenile chimp sits on a rock in a streambed observing the forest above.13795543 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee relaxes in a tree observing his surroundings.13795591 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee sits observing his surroundings.13795588 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Observing his surroundings, a young adult chimpanzee expresses nervous, social excitement in his face and with a partial erection.13795585 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult chimpanzee listens and anticipates the arrival of other chimps in his community13795583 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A resting male chimpanzee begins to pant-hoot, calling to other chimps nearby.13795576 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee relaxes and observes his surroundings as he is groomed..13795575 - Africa, Uganda, Kibale National Park. Ngogo Chimpanzee Project. A male chimpanzee sits observing his surroundings as he is groomed.13795568 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee yawns while resting with others.13795566 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. While his mom eats, a curious infant chimpanzee grabs a vine to climb.13795564 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee sits listening and watching.13795557 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult male chimpanzee sits among the saplings in the forest.13795554 - Africa, Uganda, Kibale National Park, Ngogo. A male chimpanzee listens alert.13795542 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Watchful young adult male chimpanzee named Peterson.13795594 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild Chimpanzee13795579 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. The long, narrow hands of a female chimpanzee and her offspring embrace a decaying tree, their faces hidden as they eat the dead wood from the trunk.13795577 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild female chimpanzee pauses from eating the dead wood of a decaying tree trunk and looks toward the vegetation.13795572 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild female chimpanzee self-grooms as her young juvenile daughter gestures for attention.13795570 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee rests while remaining aware of his surroundings.13795569 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Male chimpanzees pant-hoot in response to distant calls from other chimps.13795556 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee climbs a tree.13795544 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult male chimpanzee observes his surroundings from the vegetation.71417694 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Leaving his companions gathered below a tree harboring an estrous female chimpanzee, an excited male makes his move.71417690 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young juvenile chimpanzee sits yawning in the vegetation.71417683 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. With his mother close by an infant chimpanzee plays, gripping and hanging from a vine.71417681 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee relaxes as he is groomed.71417680 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee looks up into the canopy.71417695 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee sits on a vine and scratches his foot.71417689 - Africa, Uganda, Kibale National Park, Ngogo. Young adult male chimpanzee pauses during a climb to survey his surroundings.71417686 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An adolescent male chimpanzee observes the forest above.71417685 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee stands bipedally reacting to the arrival of other chimps.71417684 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Curious infant chimpanzee clings to his mother with a look of content on his face.71417682 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult chimpanzee relaxes on a path waiting for others in his group.71417679 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A female chimpanzee looks out from her perch in a tree.71417677 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Curious, young adult chimpanzee, 'Wes'.71417675 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee listens and surveys his surroundings from behind thick vegetation.71417696 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. With strong shoulders, long arms and opposable toes, a wild chimpanzee climbs with ease.71417693 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult chimpanzee listens and anticipates the arrival of other chimps in his community.71417691 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild adult male chimpanzee sits observing his surroundings.71417688 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee travels through the forest.71417678 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee perches in a tree with a slight pout on his face.71417687 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A male chimpanzee looks over his shoulder while chewing meat after a hunt.71417676 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Hearing the calls of a nearby group of chimpanzees, a female and her companions respond with their own pant-hoot vocalizations.71417697 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult male shows a playful facial expression.71417692 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild male chimpanzee examines his hand and fingers.71417674 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult male chimpanzee looks over his shoulder while eating figs (Ficus capensis).71417673 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Perched in a fig tree, a male chimpanzee holds and eats from a broken branch full of fruit (Ficus capensis).71419159 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Wild chimpanzee, 'Hare'71419164 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A wild, male chimpanzee, 'Dexter'71419160 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An infant chimpanzee plays with a stick.71419158 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. Young adult male chimpanzee, 'Wes'71419162 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A young adult male chimpanzee lying down on forest path.71419165 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A juvenile chimpanzee pauses from grooming an older male to look up and yawn.71419163 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. A young adult chimpanzee listens and waits for the chimps he has been traveling with to rejoin him.71419161 - Africa, Uganda, Kibale National Park, Ngogo Chimpanzee Project. An infant chimpanzee pauses briefly during play.
