The geographic distribution and predicted suitable habitats for Gekko japonicus and G. swinhonis in Northeast Asia A the suitable habitats were estimated using the MaxEnt ecological niche models. The minimum convex polygon for each species denotes the general extent of the species range B the occurrence points of the two gecko species are plotted on the Köppen climate classification map in Northeast Asia. Blue and red points indicate G. japonicus and G. swinhonis, respectively. The abbreviated Köppen-Geiger climate classifications are as follows – BWK: Cold desert climate, BSk: Cold semi-arid climate, Cfa: Humid subtropical climate, Cwa: Monsoon, Cwb: Subtropical highland climate, Dfa: Hot-summer humid continental climate, Dfb: Warm-summer humid continental climate, Dwa: Monsoon-influenced hot-summer humid continental climate, Dwb: Monsoon-influenced warm-summer humid continental climate, Dwc: Monsoon-influenced extremely cold subarctic climate.