Scientific name: Vipera berus
Our only venomous snake, the shy adder can be spotted basking in the sunshine in woodland glades and on heathlands. An adder bite is a very rare occurrence, and can be painful, but is almost never fatal.
Average lifespan: up to 15 years
Protected in the UK under the Wildlife and Countryside Act, 1981. Priority Species under the UK Post-2010 Biodiversity Framework.