Western lowland gorillas are the most common great ape in zoo collections and are Critically Endangered in the wild. Their complex family social structures and cognitive abilities require sophisticated welfare approaches in captivity.
Gorilla welfare in captivity requires careful attention to the integrity of the family group as the fundamental social unit. Disruption of established groups, inappropriate male-male competition, and inadequate silverback social authority all create chronic stress. Gorillas in inadequate social environments show stereotypic rocking, regurgitation and re-ingestion, and abnormal sexual behaviour. Modern zoo gorilla facilities provide complex three-dimensional environments with forage materials scattered to extend feeding time across many hours, rotating enrichment that engages problem-solving, and stable family groups that allow natural dominance structures. Positive reinforcement training enables cooperative health monitoring and reduces the need for chemical immobilisation for routine procedures. Conservation breeding through coordinated Species Survival Plans ensures genetic diversity.