Danube Delta Biosphere Reserve and the locations of the melanistic grass snakes Natrix natrix found during our study and in literature (map source: OpenStreetMap.org and geo-spatial.org).

  Part of: Fănaru G, Telea AE, Gherghel I, Melenciuc R (2022) Melanism in the grass snake Natrix natrix (Linnaeus, 1758) from the Danube Delta Biosphere Reserve, Romania. Herpetozoa 35: 257-263. https://doi.org/10.3897/herpetozoa.35.e85310