, Animals & Nature
, Threatened & Endangered Species
, Top 5 Most
IUCN 2012. 2012 IUCN Red List of Threatened Species.
Data is for the year 2012 (last updated by Top5ofanything.com February 2013). The IUCN Red List of Threatened Species is based on an objective
system of assessing the risk of extinction for a species. Species
listed as Critically Endangered, Endangered or Vulnerable are
collectively described as ‘threatened’. Comprehensive assessments of
every known species of mammal, bird, amphibian, shark, reefbuilding
coral, cycad and conifer have been conducted by scientists who then report to the IUCN.