Methodology
Areas where the geographic range of 2 or more restricted-range bird species overlaps. BirdLife International has mapped every restricted-range species using georeferenced locality records. Through this process, it identified 218 regions of the world—known as endemic bird areas (EBAs)—where the distributions of 2 or more of these species overlap. Half of all restricted-range species are globally threatened or near-threatened, and the other half remain vulnerable to loss or degradation of habitat. The majority of EBAs are also important for the conservation of restricted-range species from other animal and plant groups.
Data description
Landscapes where bird species occur, amounting to just 4.5% of the Earth's land surface, are high priorities for broad-scale ecosystem conservation. Geographically, EBAs are often islands or mountain ranges and vary considerably in size, from a few hundred ha to more than 10 million ha. EBAs also vary in the number of restricted-range species that they support (from 2 to 80). EBAs are found around the world, but most (77%) of them are located in the tropics and subtropics.
Indicator
Potentially disappeared fractions of species (PDF) - Terrestrial acidification
Method / tool
IMPACT World+