Additional Supporting Information cited in the main text of this article: Fig. S1. Sensitivity and specificity of simulated SDM Fig. S2. Bayesian spatially expanded logistic (BSEL) model uncertainty Appendix S1. Bayesian spatially expanded logistic (BSEL) model and model selection procedure Table S1. Complete list of observations and sources. Table S2. Explanatory variables and BSEL model selection. Table S3. Presence of Chelonoidis chilensis on protected areas in Argentina and Bolivia.