There are a number of interesting animals that inhabit the slopes of Mount Mariveles where the three waterfalls are located. The most notable include: the Japanese sparrowhawk, the endangered Philippine eagle (Pithecophaga jefferyi) commonly known as the monkey-eating eagle, the Philippine eagle owl, the rufous hornbill (Buceros hydrocorax) locally known as kalaw, the endangered giant golden-crowned flying fox (Acerodon jubatus), which can only be found in the Philippines. Philippine deer (erroneously reported by some as wild goats) and crab-eating macaques were also recently spotted in the area.