Note: Biome and ecoregional statistics were gathered using the WWF Terrestrial Ecoregions GIS Database (Olson, D. M. and E. Dinerstein. The Global 200: Priority Ecoregions for Global Conservation. Annals of the Missouri Botanical Garden 89:125-126.).

For statistical analysis we selected 584 ecoregions in which the portion of forest zone was above 10%. 477 of the selected ecoregions belong to forest biomes, and 107 to the savannas and woodlands or non-forest biomes. Of all these biomes 46,7% have lost all of their Intact Forest Landscapes and 23,6% have less then 10% of their forest zone area in IFL. Only 12% of all selected ecoregions still have more then half of their forest zone as IFL. Only sixteen ecoregions contain 50% of the world's remaining intact forest landscapes.

In Eurasia: Scandinavian and Russian taiga, West Siberian taiga and East Siberian taiga (the latter includes more than 8% of the world's IFL); In Central Africa: Central and Northeastern Congolian lowland forests; In North America: interior Alaska/Yukon lowland taiga, southern Hudson Bay taiga, midwestern Canadian shield forests, eastern Canadian forests, northern and eastern Canadian shield taiga; In South America: Guyanan moist forests and Guyanan highlands moist forests, Uatuma-Trombetas rainforests, Madeira-Tapajos rainforests and southwest Amazon rainforests.

Ecoregion comparative statistics