Artist Christian Votteler (1840–1916)  
Title Taf. IX.
Description
Kreuzottern (Vipera berus). 1. Männchen, 2. Weibchen, 3. Schwarze Spielart.
Date by 1897
Medium reproduction: template:color print [[Category:Unsupported technique|template:color print]], original: watercolor
Source/Photographer Bruno Dürigen: Deutschlands Amphibien und Reptilien. Eine Beschreibung und Schilderung sämmtlicher in Deutschland und den angrenzenden Gebieten vorkommenden Lurche und Kriechthiere. Magdeburg, Creutz'sche Verlagsbuchhandlung 1897
Source: https://commons.wikimedia.org/wiki/File:D%C3%BCrigen,_1897,_T09.JPG

The common European adder or common European viper (Vipera berus) is a venomous snake that is extremely widespread and can be found throughout most of Western Europe and as far as East Asia. Known by a host of common names including common adder and common viper, adders have been the subject of much folklore in Britain and other European countries.