BIRDS-Maps of bird diversity include the total species richness (using breeding, non-breeding, and combined ranges), major taxonomic groups (non-Passeriformes, Passeriformes,
Tyranni, Passeri), threatened species, and small-ranged species. Species considered small-ranged are those with a geographic range size smaller than the global median (i.e., the 50% of species with the smallest ranges). Maps are derived from digital distribution maps for all the world's birds in BirdLife International and NatureServe (2011).
For birds, maps for small-ranged species and threatened species have been generated at a spatial resolution of 10x10km. Maps for major taxonomic groups of birds and total richness have been generated at a spatial resolution of 50x50km. All maps use the Eckert IV equal-area projection.
MAMMALS-Maps of mammal diversity include the total species richness, major taxonomic Orders (Cetartiodactyla,Carnivora, Primates, Eulipotyphla, Chiroptera, Rodentia), threatened species, and small-ranged species. Species considered small-ranged are those with a geographic range size smaller than the global median (i.e., the 50% of species with the smallest ranges). Maps are based on data from the IUCN, July 2013 update.
AMPHIBIANS- Maps of amphibian diversity include the total species richness, major taxonomic Orders (Anura, Caudata,Gymnophiona), threatened species, and small-ranged species. Species considered small-ranged are those with a geographic range size smaller than the global median (i.e., the 50% of species with the smallest ranges). Maps are based on data from the IUCN, July 2013 update.