Drawing of Natrix natrix  
Size (cm):

 
Locality:

 
Sex:

 
Reference:

From the book "Guida dei Rettili e degli Anfibi d'Europa", by E. N. Arnold and J. A. Burton, ed. Franco Muzzio & c. Original title: "Reptiles and Amphibians of Britain and Europe" (modified).
Remark:

Original drawing by D. W. Owen.
Attribution:

Common livraea. a) west Europe; b) north-east and north Europe; c) south-east Europe and north-east Italy; d) Iberian peninsula.