The statistic above represents the number of species on earth as of 2018, broken down by vertebrate group and biogeographic realm. In 2018, there were some 1,500 species of birds and 320 species occupying the Afrotropical realm.
Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm
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WWF. (October 30, 2018). Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm [Graph]. In Statista. Retrieved December 26, 2024, from https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/
WWF. "Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm." Chart. October 30, 2018. Statista. Accessed December 26, 2024. https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/
WWF. (2018). Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm. Statista. Statista Inc.. Accessed: December 26, 2024. https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/
WWF. "Number of Terrestrial and Freshwater Species as of 2018, by Vertebrate Group and Biogeografic Realm." Statista, Statista Inc., 30 Oct 2018, https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/
WWF, Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm Statista, https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/ (last visited December 26, 2024)
Number of terrestrial and freshwater species as of 2018, by vertebrate group and biogeografic realm [Graph], WWF, October 30, 2018. [Online]. Available: https://www.statista.com/statistics/343465/number-of-species-on-earth-by-vertebrate-group-and-biogeografic-realm/