Adder (Vipera berus) in closeup, before shedding skin, Northumberland National Park, England, United Kingdom, Europe

Adder (Vipera berus), male after moulting, in the bog

Tongued adder (Vipera berus) in a moor, reptile, poisonous snake, Oldenburger Muensterland, Germany, Europe

Common European Adder or Viper (Vipera berus), Berchtesgaden National Park, Bavaria, Germany, Europe

Common European viper (Vipera berus), Emsland, Lower Saxony, Germany, Europe