Figure 1. Two distinct color variations of Texas horned lizard models were used in this study. Gray models (A) were painted to match gray lizards found in Kenedy and Karnes City and red models (B) were painted to match Texas horned lizards found on the Dimmit County ranch. We used 3 size classes of models hatchlings, juveniles, and adults (C) and controls (D). Models were created to be as morphologically accurate as possible to mimic actual Texas horned lizards (E).