Endangered species

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Bufo periglenes, the Golden Toad, was last recorded on May 15, 1989
Lower Risk

Other categories

Related topics

NatureServe category abbreviations

An endangered species is a

habitat restoration

Human activity is a significant cause in causing some species to become endangered.[1][2]

Conservation status

Lake Saimaa, Finland, Saimaa ringed seals are among the most endangered seals in the world, having a total population of only about 400 individuals.[3]


extinct. Multiple factors are considered when assessing the status of a species; e.g., such statistics as the number remaining, the overall increase or decrease in the population over time, breeding success rates, or known threats.[4] The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system.[5]

Over 50% of the world's species are estimated to be at risk of extinction,[6] but the frontier between categories such as 'endangered', 'rare', or 'locally extinct' species is often difficult to draw given the general paucity of data on most of these species. This is notably the case in the world Ocean where endangered species not seen for decades may go extinct unnoticed.[7]

Internationally, 195 countries have signed an accord to create

Species Recovery Plans

IUCN Red List

The Siberian tiger is an Endangered (EN) tiger subspecies. Three tiger subspecies are already extinct (see List of carnivorans by population).[8]
American burying beetle
, an endangered species of insect
grey wolf
. Approximately 143 are living in the wild.