1. https://www.worldwildlife.org/publications/living-planet-report-2020
2. Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES): https://ipbes.net/news/Media-Release-Global-Assessment
3. WWF – Vertebrate species include: Mammals, birds, fish, reptiles and amphibians
4. IUCN (iucn.org)
5. Global Pangolin Conservation Status: https://www.fws.gov/international/pdf/pangolin-conservation-status-challender.pdf
6. IUCN (iucn.org)