Nature and Animals
600 animal species, from blue whales to tardigrades. Identification, conservation, biodiversity: everything to understand the animal kingdom.
The animal kingdom has about 8 million species, of which 1.5 million are already described. Nobody knows them all. But 50 to 100 key species let you understand biodiversity, its dynamics, its threats. And stop confusing a cheetah with a leopard.
SAPIRO covers 600 animal species organized by continent, habitat and family, with contextualized explanations for each question.
Nature in numbers
- 8 million estimated species on Earth, of which 1.5 million described
- 47,000+ threatened species according to IUCN Red List 2025
- 725,000 human deaths per year caused by mosquitoes (most dangerous animal)
- 70% drop in African animal populations since 1970 (WWF)
- 600 animal species in SAPIRO, from the best-known to the strangest
The essentials
By region and family
Family learning
Frequently asked questions about animals
What is the most dangerous animal in the world?
The mosquito is the most dangerous animal in the world with about 725,000 human deaths per year, mainly from malaria and dengue. It is the animal that has killed the most humans in history (50 to 70 billion cumulative deaths).
What is the difference between a cheetah and a leopard?
The cheetah is slender with solid spots (never rosettes) and black "tear lines" under the eyes. The leopard is stockier with rosettes (flower-shaped spots). The cheetah does not climb trees, the leopard does.
How many animal species exist in the world?
There are an estimated 8 million species on Earth, of which 1.5 million have already been scientifically described. Biodiversity remains largely unexplored: 86% of land species and 91% of marine species have not yet been described.
Which animals are endangered?
More than 47,000 species are threatened according to the IUCN Red List 2025. Critical cases: Javan rhino (76 individuals), vaquita (10 individuals), Chinese pangolin, Sumatran tiger (under 400), Tapanuli orangutan (800 individuals).