The Harangan Tapanuli or Batang Toru Ecosystem is the last habitat for the newly described, critically endangered Tapanuli Orangutan, the rarest great ape in the world. The Tapanuli Orangutan with the scientific name ‘Pongo tapanuliensis’ population is estimate less than 800 individuals remain in the wild and only lives in the the rugged terrain of the Batang Toru Ecosystem in the three Tapanuli districts of North Sumatra.
