Threatened bird species density

BirdLife International has developed digital range maps of all threatened bird species. This map is based on distribution data for the 1186 species assessed as threatened in 2000. The data are plotted as a global density surface, representing the number of species potentially present in each location. The map is the first such treatment of any large group of threatened species.
Source: density surface provided by BirdLife International, further information on threatened birds in BirdLife International.
BirdLife International. 2000. Threatened birds of the world. Lynx Edicions and BirdLife International: Barcelona and Cambridge, UK.