First records of melanistic individuals of the Common Wall Lizard (Podarcis muralis) in Belgium In Belgium, the geographical range of the Common Wall Lizard is restricted to the thermophilic valleys of the river Meuse, most of the populations being situated in the Condroz, the Herve region and the Fagne-Famenne- Calestienne. Nowadays, isolated populations also occur in Flanders, outside the natural range of the species. These populations are mostly concentrated along railway tracks. In one population, melanistic individuals have been observed. This is the first record of melanistic wall lizards in Belgium.