The EDGE of Existence programme is the only global conservation initiative to focus specifically on threatened species that represent a significant amount of unique evolutionary history. 

Using a scientific framework to identify the world’s most Evolutionarily Distinct and Globally Endangered (EDGE) species, the EDGE of Existence programme highlights and protects some of the most unique and most wonderful species on the planet.  EDGE species have few close relatives on the tree of life and are often extremely unusual in the way they look, live and behave, as well as in their genetic make-up.  They represent a unique and irreplaceable part of the world’s natural heritage, yet an alarming proportion are currently sliding silently towards extinction unnoticed.

The aim of the EDGE programme is to put these species on the map and catalyse conservation action to secure their future. Each year a number of the most poorly known and neglected EDGE species are selected for conservation attention.  You can learn more about these species in the Species and Conservation sections of this website, and donate towards targeted conservation actions in the Support section.  Where virtually nothing is known, ZSL-led expeditions often represent the first step in determining whether rare and cryptic EDGE species still survive.  Longer-term surveys are carried out by EDGE Fellows (aspiring in-country scientists that receive financial, institutional and logistical support from the EDGE programme) to determine the status of these species and identify appropriate conservation actions.

The ultimate goal of the EDGE programme is to ensure that local stakeholders, governments, and in-country and international conservation organisations take ownership of these forgotten species and commit to ensuring their future survival. Learn more about our specific goals here.

Discover how EDGE species are identified.

Find out more about the goals of the programme.

Learn about the people behind the EDGE concept.

Learn more about the scientists in the field.

Mammals on the EDGE: Conservation Priorities
 Based on Threat and Phylogeny

You can view the paper here | More on the EDGE Blog

[Title:] EDGE Information
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An 8 page document containing information on the EDGE of Existence programme.

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[Title:] Contact
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Contact members of the EDGE team for specific research information or advice

[Title:] EDGE Species
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Learn more about the top 100 EDGE species here