Cyril Ruoso / Professor Matsuzawa, primatologist, in the field with stone hammer and anvil tool used by local Chimpanzees (Pan troglodytes verus) Bossou, Republic of Guinea. December 2012.

Cyril Ruoso / Professor Matsuzawa, primatologist, in the field. Republic of Guinea December 2012.

Cyril Ruoso / Professor Matsuzawa, primatologist, in the field. Bossou, Republic of Guinea December 2012.

Jami Tarris / Orangutan (Pongo pygmaeus) primatologist, Dr. Birute Mary Galdikas, and dominant female, Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia

Cyril Ruoso / Allison Jolly, a primatologist studying Ring-tailed lemurs. Berenty, Madagascar. October 2005.

Cyril Ruoso / Andrianome Vonjy Nirin, a Malagasy researcher studies impact of Lead Tree (Leucaena leucocephala) on the Ring-tail Lemur (Lemur catta). Plant is suspected of poisoning lemurs, Berenty Private Reserve,...

Pete Oxford / White-taile Titi (Callicebus discolor) biologist, Amy Porter, radio tracking individual, Tiputini Biodiversity Station, adjacent to Yasuni National Park, Amazon Rainforest, Ecuador

Tim Laman / Primatologist, Tom Butynski, wading across the Rio Ole, Bioko Island, Equatorial Guinea, Rapid Assessment Visual Expedition, International League of Conservation Photographers, January 2008. Model rel...

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) visited by Jane Goodall, Gombe Stream National Park, Tanzania

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) in cage visited by Jane Goodall, Gombe Stream National Park, Tanzania

Gerry Ellis / Chimpanzee (Pan troglodytes) with Doctor Jane Goodall and Dale Peterson, Gombe Stream National Park, Tanzania

Jabruson / Grave of Dian Fossey, primatologist, murdered in 1985, Parc des Volcans NP, Rwanda - memorial

Mitsuaki Iwago / Chimpanzee (Pan troglodytes) visited by Jane Goodall, Gombe Stream National Park, Tanzania

Anup Shah / Lynne Isbell, Primatologist, in the field with Patas monkeys {Erythrocebus

Anup Shah / Lynne Isbell, Primatologist, in the field with Patas monkeys {Erythrocebus

Jami Tarris / Orangutan (Pongo pygmaeus) primatologist, Dr. Birute Mary Galdikas, and dominant female, Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia

Cyril Ruoso / Orangutan (Pongo pygmaeus) and primatologist Emmanuelle Grundmann, Indonesia

Cyril Ruoso / Andrianome Vonjy Nirin, a Malagasy researcher studies impact of Lead Tree (Leucaena leucocephala) on the Ring-tail Lemur (Lemur catta). Plant is suspected of poisoning lemurs, Berenty Private Reserve,...

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) primatologist Allison Jolly with four lemurs, vulnerable, Berenty Private Reserve, Madagascar

Gerry Ellis / Jane Goodall portrait, Gombe Stream National Park, Tanzania

Ugo Mellone / Primatologist showing the results of her research to group of local people living around the forest, Necocli, Colombia. January, 2022.

Ugo Mellone / Primatologist and her assistant searching for monkeys in forest, Marimonda, Necocli, Colombia. January, 2022.

Ugo Mellone / Primatologist playing an animal track identification game with two people from the local community, Marimonda, Necocli, Colombia. January, 2022.

Ugo Mellone / Primatologist holding Bellucia pentamera fruit, part of the diet of the Colombian spider monkey (Ateles fusciceps rufiventris), Marimonda, Necocli, Colombia. January 2022.

Ugo Mellone / Primatologist holding Bellucia pentamera fruit, part of the diet of the Colombian spider monkey (Ateles fusciceps rufiventris), Marimonda, Necocli, Colombia. January 2022.

Ugo Mellone / Primatologist and her assistant searching for monkeys in the forest canopy, Marimonda, Necocli, Colombia. January, 2022.

Ugo Mellone / Primatologist and her assistant searching for monkeys in the forest canopy, Marimonda, Necocli, Colombia. January, 2022.