| + | Adder bites are most frequent between february and october. The habitat of the adder (Vipera Berus) extends throughout England, Wales, Scotland and some islnad of the coast of Scotland <ref> '''Treatment of bites by adders and exotic venomous snake''',Warrell DA,''BMJ'' 2005;331:1244 doi:10.1136/bmj.331.7527.1244(Published 12 november 2005) </ref>. |