Grass Snakes in Scotland

The British Isles are on the northwestern fringe of Europe and were at one time attached to Europe by land bridges. Grass snakes occur as far north as southern Scotland while our only venomous snake, the Adder or Viper is generally what it's called. The northern Adder is actually the northern most distributed snake in the world. It's found well north of the Arctic Circle in Norway, Sweden, Finland and the Colop and in Europe, Siberia. As Britain warms, it becomes less suitable for the Adder and would be more suitable for a viper species from Europe.