IUCN Red List
This chart shows the percentage of various animal species, by group, on the IUCN Red List as of 2007. The Red List is an online listing of endangered species categorized by taxonomy, type of threat, and other criteria.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Preserving Biodiversity. October 17, 2013."
http://cnx.org/content/m44898/latest/Figure_47_04_01.png
OpenStax CNX
CC BY 3.0.
