ABSTRACT The Sultan Syarif Hasyim Forest Park area is one of the lowland conservation areas in Riau Province. SSH Tahura can be found in at least 40 birds, four species of reptiles, and 12 species of mammals. One of the types of animals in Tahura SSH is the gibbon. The gibbons in the Tahura SSH area have never been calculated for their distribution and population density. This study aims t…