The IUCN Red List of Threatened Species" was established in 1964, and works to define the conservation status and extinction risk for biological species on a global level. On their site (2024) it is stated that more than 45,300 species (28% of all assessed) are threatened with extinction. Examples of species types listed on their site are: amphibians, mammals, conifers, birds, sharks & rays, reef corals, selected crustaceans, reptiles, and cycads.