Image used in hero section:Montseny brook newt. Photo credit: Jan Van Der Voort.

The following criteria are introduced on AZE site criteria page. Here you will learn how AZE applies these criteria to determine site eligibility.


Abies nebrodensis.
  • AZE recognizes IUCN as the listing authority for defining species of concern.
  • AZE will not define sites for newly discovered and Data Deficient species until these have been assessed and classified by the relevant IUCN authority to avoid the development of a parallel assessment process. Neither will AZE address species that are currently considered subspecies or Vulnerable, but will encourage groups with an interest in addressing such species and subspecies to do so (e.g., through the Key Biodiversity Areas program), if such sites are not already identified as Key Biodiversity Areas. However, any species regarded as Vulnerable that do occur within AZE sites will also be noted to support the need for conservation in those areas.
  • For those species considered Endangered or Critically Endangered for which no specific site can currently be selected for lack of data, AZE encourages expeditions to locate populations in hopes that a site can be selected at a later date.
  • AZE recognizes that not all Endangered and Critically Endangered species are so site-restricted. Although such wider-ranging species are important conservation targets that are deserving of conservation resources, they are not the targets of this particular conservation initiative.
  • Species listed by the IUCN as Extinct in the Wild (EW) are included. An AZE site for an EW species should be the most viable potential site for reintroduction, with a strong preference toward sites within the natural historic range of occurrence. This may not be the most recently occupied site.

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 recognizes that even when an overwhelmingly significant proportion of a species’ wild population (meaning ~ greater than 95% of the species global population for at least one life history segment) occurs in a single area, the conservation of any remaining populations in other areas is still of great importance. AZE encourages conservation action for species that occur at two or more sites to prevent species from dropping to the point where emergency measures are required.
  • “Known” populations include those localities with a published record of the species, even if there are no recent survey data (i.e., the species is assumed to persist unless proven otherwise).


Santa Marta Parakeet. Photo credit: George Jett.
  • AZE suggests that in defining discrete areas the following issues are borne in mind: the extent of contiguous habitat; the boundaries of current land management units such as protected areas; the extent of occurrence of the species relative to practical conservation considerations; and the potential for significant gene flow between populations.
  • The boundary of the area should be defined according to the most practical unit for which conservation can be applied. It is suggested that consideration is given to areas of important habitat lying adjacent to existing protected areas, or in the buffer zones, for inclusion within the boundaries of each area.
  • The name of the area should be chosen to facilitate its location by the broadest possible audience.
  • The size of the area should be noted, so that further analysis can enable partners to sort sites according to area for planning and prioritizing purposes.

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