O'Neill-Wagner, P. L. 1994. When trying to get your monkeys to behave, try perches. In Touch 1(2), 6-8.

Higher perching elevations appear to be a very desirable feature in this environment for the expression of six of the twelve behaviors studied. Mid-level perches, on the other hand, were utilized more for only two of the behaviors: self play and eating of provisioned foods. And, ground level was the location selected most often for only locomotion and foraging, behaviors which are more limited to the ground in this setting. Present findings indicate that some elevations are more appropriate or inviting than others for expression of specific behaviors. Creating cage environments with multiple elevations for perch sites may not only reduce population density for captive groups of monkeys, but may also offer animals necessary alternatives, stimulate activity, and facilitate the expression of species-typical behaviors in a well- provisioned captive environment.