Model performance of habitat-based and resource-based models for predicting the occurrence of four steppe bird species in the study area.

For habitat-based models, model performance according to predictions obtained using cross-validation is shown. For resource-based models, model performance of resource-based suitability estimates for the whole breeding season and for different windows of time across bird surveys (in parenthesis) are shown. The threshold that maximizes the sum of sensitivity plus specificity is also given. RP = Red-legged Partridge, SC = Stone Curlew, CL = Calandra Lark, LB = male Little Bustard. N = 145.