Spider monkeys are among the most endangered primates in Latin America. Their dependence on primary forest makes them highly sensitive indicators of forest quality.
Spider monkeys caught for the pet trade experience acute trauma during capture, which often involves killing the mother. Pet spider monkeys suffer severe behavioral deprivation and social isolation, developing permanent psychological damage. Habitat fragmentation forces groups into smaller, isolated patches with insufficient fruit trees, causing chronic nutritional stress and population decline. Road kills and electrocution on uninsulated power lines cause individual welfare harms at significant scale in fragmented landscapes. Sanctuaries are overwhelmed with confiscated and surrendered individuals who cannot be returned to the wild.