What is the only poisonous snake native to Britain?

The adder is recognized as the only venomous snake native to Britain. It is commonly found in a variety of habitats, including heathland, woodlands, and grasslands across the country. The adder has distinctive markings, such as a zigzag pattern along its back, which helps in its identification. Though its venom is rarely life-threatening to humans, it can cause painful swelling and discomfort.

Grass snakes, while sometimes confused with adders, are non-venomous and primarily feed on amphibians. The ringed viper does not exist as a native species in Britain, and while the common European cobra is a venomous snake, it is not native to the UK. Understanding these distinctions is essential for appreciating the biodiversity and ecological characteristics of Britain.