according to WWF Sumatran Orangutan Sumatran Orangutan their arboreal Sumatran cousins Sumatran Orangutan World Wildlife Website Sumatran Orangutan Sumatran orangutan https://www.worldwildlife.org/species/sumatran-orangutan Sumatran Orangutan Sumatran orangutans World Wildlife Website Sumatran Orangutan Sumatran Orangutan according to the WWF Sumatran Orangutan Sumatran Orangutan Sumatran orangutan Sumatran orangutans depleting at an astonishing rate Sumatran Orangutan Sumatran Orangutan Sumatran Orangutans Sumatran Orangutan explains Sumatran Orangutan Sumatran Orangutan Sumatran Orangutan: Photo Credit WWF Sumatran Orangutan 7300 are left in the wild their arboreal Sumatran cousins