As of 2024, more than two million animal and plant species had been categorized worldwide, 1.1 million of which were insects. By comparison, roughly 6,700 different types of mammals have been categorized.
Number of organisms discovered in the world up to 2024, by group
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IUCN. (October 28, 2024). Number of organisms discovered in the world up to 2024, by group [Graph]. In Statista. Retrieved April 22, 2025, from https://www.statista.com/statistics/264674/biodiversity-worldwide/
IUCN. "Number of organisms discovered in the world up to 2024, by group." Chart. October 28, 2024. Statista. Accessed April 22, 2025. https://www.statista.com/statistics/264674/biodiversity-worldwide/
IUCN. (2024). Number of organisms discovered in the world up to 2024, by group. Statista. Statista Inc.. Accessed: April 22, 2025. https://www.statista.com/statistics/264674/biodiversity-worldwide/
IUCN. "Number of Organisms Discovered in The World up to 2024, by Group." Statista, Statista Inc., 28 Oct 2024, https://www.statista.com/statistics/264674/biodiversity-worldwide/
IUCN, Number of organisms discovered in the world up to 2024, by group Statista, https://www.statista.com/statistics/264674/biodiversity-worldwide/ (last visited April 22, 2025)
Number of organisms discovered in the world up to 2024, by group [Graph], IUCN, October 28, 2024. [Online]. Available: https://www.statista.com/statistics/264674/biodiversity-worldwide/
