Observations on the Behavior of Gibbons (Hylobates leucogenys, H. gabriellae, and H. lar) in the Presence of Mirrors

Three captive gibbons ( Hylobates leucogenys, H. gabriellae , and H. lar ) were videotaped in the course of longitudinal exposure to mirrors introduced into their familiar cage or island housing situation. The gibbons, which differed in age, sex, species, and rearing condition, exhibited great individual difference in their behavioral reactions to mirrors, spanning from […]