The EDGE of Existence programme uses EDGE Lists to prioritise species for conservation. The team produces EDGE Lists for amphibians, birds, corals, mammals, reptiles and sharks and rays (elasmobranchs).
Our EDGE Lists are updated periodically to incorporate changes in both taxonomy and conservation status of EDGE species, and we provide the most recent data for download.
We are currently in the process of transitioning EDGE scores from those produced using the original 2007 EDGE metric to the new ‘EDGE2’ metric outlined here. Please bear with us whilst we guide the new EDGE lists through peer review. In the meantime, we make available here:
The 2022 EDGE List for mammals only, taken from the EDGE2 paper – which uses the new EDGE2 metric. Click here to download.
The 2020 EDGE Lists for amphibians, birds, mammals, corals, reptiles and sharks – the ED scores of all species and the EDGE scores and ranks of EDGE species (species above median ED and VU, EN, CR on the IUCN Red List) created using the 2007 EDGE metric.
Click here to download the 2020 EDGE Lists created under the 2007 EDGE metric.
Current (2023) EDGE lists for all groups may be available upon request by emailing firstname.lastname@example.org.
When creating our EDGE amphibians list, we follow the taxonomy of Frost’s Amphibian Species of the World. For birds, we follow BirdLife International. For corals, we follow Corals of the World. For mammals, we follow The Mammal Diversity Database. For reptiles, we follow The Reptile Database.
What is an EDGE List? Click here to find out!
Note: EDGE Lists are dynamic, and are affected by changes in taxonomy and conservation status. All taxonomic and IUCN Red List data underpinning the 2020 EDGE Lists are correct as of April 2020.