Table 1.

The number of species categorized in each IUCN threat category and the transformations of probabilities of extinction used in this study. (GE is the transformation used in traditional EDGE protocols while IUCN 50 is that used by our study. Data on transformations from Mooers et al. [18].)

IUCN category	no. species	GE	IUCN 50 years	IUCN 500 years	pessimistic scenario
Least Concern	7656	0	0.00005	0.0005	0.2
Near Threatened	877	1	0.004	0.02	0.4
Data Deficient	59	1	0.004	0.02	0.4
Not Evaluated	111	1	0.004	0.02	0.4
Vulnerable	710	2	0.05	0.39	0.8
Endangered	393	3	0.42	0.996	0.9
Critically Endangered	183	4	0.97	1	0.99
Extinct in the Wild	4	6	1	1	1