Three-year-old Siska watches intently as mom Eirina uses a twig to extract food from a hollowed-out fire hose — an exciting example of tool use in great apes. 🦧 Video: Volunteer Photographer Jo Ashton #Orangutan #SumatranOrangutan #DenverZooConservationAlliance #AnimalBehavior #ToolUse #SavingWildlifeTogether