Chimpanzees are among the most cognitively complex animals on earth. Zoo enrichment that supports their natural tool use behaviors is essential for psychological welfare.
Chimpanzees are our closest living relatives, sharing approximately 98.7% of their DNA with humans. Their cognitive abilities include problem-solving, theory of mind, tool manufacture, and cultural transmission. When zoo chimpanzees are kept in barren environments without cognitive challenge, the results are devastating: repetitive rocking, self-injury, coprophagy, and severe psychological deterioration. These behaviors are not personality quirks but symptoms of profound psychological suffering. Tool use enrichment - providing termite mounds with hidden food requiring stick use, puzzle feeders, nut-cracking stations, and opportunities for social learning - addresses core psychological needs. The best chimp facilities invest heavily in naturalistic habitats with multiple daily enrichment presentations.