Map of collection localities and numbers of 61 non-spitting cobra specimens of Naja kaouthia (black line) and N. fuxi (blue line) from each site in Thailand. Altitudes (m above mean sea level [m a.s.l.]) where cobra specimen(s) were found are indicated in each locality (N = north, C = centre, I = north-east, W = west, and S = south). Codes in brackets denote specimen numbers used in this study, related to the phylogenetic results. Map background has been applied from https://maps-for-free.com.