Screening scores of MaxEnt models considered.

Low suitability for significant parts of the species' native range earned a failing score under “Native Range.” Low suitability scores (<0.1) for occupied localities earned a failing score under “Minimum Training Presence.” Parameter counts in excess (×2) of those warranted by Akaike's Information Criterion earned a failing score under “Overfitting.” Ecologically implausible geographic matches (e.g., Scandinavia, British Columbia, Aleutians) for this heliophilic sub-tropical snake earned a failing score under “Eco-plausiblity Test.”