Self-injurious behavior in captive primates signals profound psychological suffering — its causes and prevention are central to primate welfare in zoological and research settings.
Self-injurious behavior in captive primates is among the most disturbing manifestations of the psychological suffering that inadequate captive conditions can cause. These behaviors, which have no function in normal primate behavioral repertoires, reflect the desperation of cognitively complex social animals subjected to environments that fail their fundamental needs. Early social deprivation — particularly isolation during critical developmental periods — produces lasting behavioral abnormalities that even excellent subsequent care cannot fully reverse. The welfare imperative is prevention: social housing from the earliest possible age, environmental complexity that allows the expression of species-typical behavior, and commitment to psychological as well as physical health as welfare goals.