Performance indices of species distribution models of Acorn Woodpeckers.

The three species distribution models we compared were constructed from abiotic data alone, Quercus occurrence points alone, and abiotic data in combination with Quercus occurrence points. Higher scores indicate increased model performance for AUC of ROC, AUC of Kappa, AUC of Overall Performance and Pearson’s correlation coefficient. Lower scores indicate increased model performance for AUC of Commission Index and AUC of Omission index. For each parameter, the best performing models are highlighted in bold. Thus, species distribution models that include Quercus occurrence points perform consistently better across a variety of performance indices, particularly with respect to the AUC of Commission Index, which is important for evaluating which factors contribute to the southern distribution limits of Acorn Woodpecker.Performance indices of species distribution models of Acorn Woodpeckers.