Thousands of primates are held in captive conditions worldwide, where they are routinely exposed to different stimuli compared to their natural environments. Primates develop a wide range of behaviours, shaped by their environments, which differ in frequency, form, context and/or intensity from the behaviour of their wild conspecifics . This study – by students of the Science College Maastricht – aimed to understand the abnormal behaviours and social interactions of the Western Lowland Gorilla (Gorilla gorilla gorilla) in GaiaZoo, Kerkrade, Limburg, The Netherlands. in captive populations.