On 29 January 2010, the IUCN Red List of Threatened Species identified 5220 (2754 animals, 1 fungus, 2464 plant, 1 protist) endangered species, subspecies and varieties, stocks and sub-populations.

For IUCN lists of endangered species by kingdom, see:

• Animals (kingdom Animalia) — IUCN Red List endangered species (Animalia)
  • Amphibians — List of endangered amphibians
  • Birds — List of endangered birds
  • Fish — List of endangered fishes
  • Invertebrates — List of endangered invertebrates
    • Arthropods — List of endangered arthropods
      • Insects — List of endangered insects
    • Molluscs List of endangered molluscs
  • Mammals — List of endangered mammals
  • Reptiles — List of endangered reptiles
• Fungi (kingdom Fungi) — IUCN Red List endangered species (Fungi)
• Plants (kingdom Plantae) — IUCN Red List endangered species (Plantae)
• Protists (kingdom Protista) — IUCN Red List endangered species (Protista)