Image used in hero section:Pair of Floreana mockingbirds. Photo credit: Luis Ortiz-Catedral.

The Alliance for Zero Extinction (AZE) aims to prevent extinctions by identifying and safeguarding key sites, each one of which is the last remaining refuge of one or more Endangered or Critically Endangered species.

Contribute to AZE sites map

Help to fight extinction by updating information about an existing site or submitting a new site to our map.

Submit a siteUpdate a site

AZE uses the following criteria to identify priority sites. An AZE site must meet all three criteria to qualify. For more information, see our page on applying AZE criteria.

1. Endangerment

An AZE site must contain at least one Endangered (EN) or Critically Endangered (CR) species, as assessed on the IUCN Red List.

2. Irreplaceability

An AZE site should only be designated if it is the sole area where an EN or CR species occurs, contains the overwhelmingly significant known resident population (>95%) of the EN or CR species, or contains the overwhelmingly significant known population (>95%) for one life history segment (e.g. breeding or wintering) of the EN or CR species.

3. Discreteness

The area must have a definable boundary within which the character of habitats, biological communities, and/or management issues have more in common with each other than they do with those in adjacent areas.

These criteria are the equivalent of Key Biodiversity Area (KBA) criterion A1e: Site regularly holds effectively the entire global population size of a Critically Endangered or Endangered species. Therefore, all AZE sites are also KBAs. Click for more information

Be a force for zero extinction

Policy Makers

Include AZE sites within your national government conservation strategies

Government resources

Research Scientists

Help conservation efforts through submitting site updates and nomination

Science resources

Conservation organizations

Protect sites independently or in collaboration with other organizations

Conservation resources

Individual contributors

Give your support to individual AZE partner organizations around the world

Contribution options

Bale Mountains. Photo: stefancek