How dangerous is an adder bite?

Most snake bites in the UK are not serious and can be treated, but an adder bite can cause severe reactions and must be assessed urgently. Call 999 or go to A&E immediately, and do not drive yourself.

Will adders chase you or attack unprovoked?

Adders do not chase people and normally retreat when they sense someone approaching. Bites are defensive and usually happen when a snake is handled, stepped on or when a hand or foot is placed too close. Give any adder plenty of space.

How do I identify an adder?

Adders are short, stocky snakes, usually around 60cm long, and most have a dark zigzag down the back. Males are often grey or cream and females brown or copper, but completely black adders also occur. Observe from a distance and never approach a snake just to identify it.

Common Hazards

Adders: Should You Be Worried?

Britain's only venomous snake is shy and normally retreats, with bites most often occurring when an adder is handled or accidentally disturbed. Bites are rare but can be serious and always need urgent medical help—the actual risk is far smaller than the instinctive fear suggests.

9 August 20269 min read