Updated: May 7, 2026

Design and Use of an Apparatus for Presenting Graspable Objects in 3D Workspace
Published on: August 8, 2019
Cyril C Grueter1, Martha M Robbins, Felix Ndagijimana
1Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany; Dian Fossey Gorilla Fund International, Atlanta, GA, USA; The University of Western Australia, Crawley, WA, Australia.
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Wild mountain gorillas exhibit tool use, with a mother observed using a bamboo culm as a ladder for her infant. This behavior, seen in Volcanoes National Park, suggests gorillas use tools for non-food-related tasks and overcoming environmental obstacles.
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