, Animals & Nature
, Threatened & Endangered Species
, The United States
Sources: "2015 IUCN Red List of Threatened Species."
Data is the top 5 countries with the most threatened species by taxonomic group. This list contains critically endangered, endangered and vulnerable taxonomic groups. Including: mammals, reptiles, fish, amphibians, Molluscs, other inverts, plants and birds.
Threatened species are any species (including animals, plants, fungi, etc.) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate.