Natrix natrix ...

• Main Author: Elmberg, Johan
• Format: Text
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Reptilia; Squamata; Natricidae; Natrix; Natrix natrix; North Sweden
• Online Access: https://dx.doi.org/10.5281/zenodo.8030431; https://zenodo.org/record/8030431

Grass Snake Natrix natrix (Linneaus 1758) Distribution (Figure 9). Included records from Artportalen (N=200): all reports from Gästrikland, Hälsingland, and coastal Medelpad (where widespread). Reports from other areas have been included only if documentation was available. This species and black morph Vipera berus are widely confused, even among naturalists. Occurs throughout the Southern Boreal. Widespread and fairly common in Gästrikland and coastal Hälsingland, local and scarce in interior Hälsingland and coastal Medelpad. There is a disjunct well-documented record at 480 m altitude in central Härjedalen, in the Northern Boreal region (Figure 9). This is by far the highest known record, whereas the 2 nd to 4 th highest in North Sweden were all made at 180 m or lower. For the former extraordinary record there is no obvious suspicion of anthropogenic spread. However, well-documented records north of the present range (filled black circles in the map) can all be suspected to have anthropogenic origin, and ... : Published as part of Elmberg, Johan, 2023, Amphibians and reptiles in North Sweden: distribution, habitat affinities, and abundance (Classes: Amphibia and Reptilia), pp. 301-335 in Zootaxa 5301 (3) on pages 319-322, DOI: 10.11646/zootaxa.5301.3.1, http://zenodo.org/record/8030434 ...