National Geographic Kids -- Orangutan
https://kids.nationalgeographic.com/animals/mammals/facts/orangutan
Orangutan Foundation -- Quick Facts:
https://orangutan.org/orangutan-facts/quick-orangutan-facts-figures/
World Wildlife -- Orangutan
https://www.worldwildlife.org/species/orangutan/
Kids Canopy
https://kids.orangutan.com/
Video: BBC Learning Hub -- Orangutans in Danger:
https://www.bbclearninghub.com/videos/orangutan-sanctuary
Kids Britannica -- Orangutan:
https://kids.britannica.com/students/article/orangutan/312821