Date research was conducted: October 31, 2016 Source: World Wildlife Fund
Species that have gone extinct: 801
Number of Animals (species) that are critically endangered: 3,879
Number of Animals that are endangered: 5,689
Number of Animals that are vulnerable: 10,002
Number of Animals that are near threatened: 4,389
http://www.biologicaldiversity.org/programs/biodiversity/elements_of_biodiversity/extinction_crisis/ Contact: Noah Greenwald 2010
Center for Biological Diversity: about 1,000 species have gone extinct in past 500 years.
The IUCN has assessed roughly 3 percent of described species and identified 16,928 species worldwide as being threatened with extinction, or roughly 38 percent of those assessed.