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Share of species threatened with extinction

Threatened species are those categorized as 'Critically Endangered', 'Endangered' and 'Vulnerable' on the IUCN Red List. This is shown by taxonomic group, and only
for the more completely evaluated groups (where >80% of species have been evaluated).

0%20%40%60%80%100%Horseshoe Crabs100%Gymnosperms41%Amphibians40%Mammals26%Birds14%