Formed in 2000 and launched globally in 2005, the Alliance for Zero Extinction(AZE) engages 88 non-governmental biodiversity conservation organizations working to prevent species extinctions by identifying and safeguarding the places where species evaluated to be Endangered or Critically Endangered under IUCN-World Conservation Union criteria are restricted to single remaining sites. The map below shows 587 sites for 920 species of mammals, birds, amphibians, reptiles, conifers, and reef-building corals, providing a tool to defend against many of the most predictable species losses.