Table 1.

Performance (R²) of models of threatened species richness.

		Total vertebrates	Amphibians	Reptiles	Birds	Mammals
Total species richness only	Global	0.49 ± 0.03	0.04 ± 0.03	0.45 ± 0.04	0.37 ± 0.08	0.36 ± 0.05
Total species richness, environmental and anthropogenic covariates	Global	0.94 ± 0.01	0.72 ± 0.05	0.87 ± 0.02	0.92 ± 0.01	0.94 ± 0.01
	Regional	0.81 ± 0.14	0.63 ± 0.20	0.70 ± 0.19	0.77 ± 0.16	0.79 ± 0.15

Models are fitted at the global scale with only total species richness as a predictor, and at the global and regional scales using total species richness and a range of environmental and human impact covariates. Each datum represents the mean model performance, measured using R², and standard deviation, across random forest models (mean ± SD). A full summary of model parameters and of regional level model performance can be found in Supplementary Tables 1 and 2. Source data are provided as a Source Data File.