Distribution of melanistic grass snakes and rare color pattern morphotypes based on iNaturalist records. Small inset map shows subspecies distribution according to Asztalos et al. (2021a): Natrix natrix natrix – yellow, N. n. vulgaris – red, N. n. moreotica – grey, N. n. scutata – green. Hybrid zones hatched. The ‘schweizeri morphotype’ was previously only known from some Cyclades islands (including Milos) and from Cyprus (Kabisch 1999; Baier et al. 2009), from where no photos are on iNaturalist.

  Part of: Fritz U, Ihlow F (2022) Citizen Science, taxonomy and grass snakes: iNaturalist helps to clarify variation of coloration and pattern in Natrix natrix subspecies. Vertebrate Zoology 72: 533-549. https://doi.org/10.3897/vz.72.e87426