Wildlife

Adder Welfare: Population Decline and Human Disturbance in the UK

The adder, Britain's only venomous snake, has declined dramatically and faces welfare threats from deliberate killing, road mortality and loss of heathland habitat.

Key Facts

Adder populations have declined by an estimated 89% since the 1970s
Deliberate killing by humans is still documented despite legal protection
Adders are protected under Schedule 5 of the Wildlife and Countryside Act 1981
They require specific habitat structure: sun-exposed basking areas with dense heather refuge

Welfare Considerations

Deliberately killed adders suffer traumatic death from shooting, spades or burning. Road mortality causes direct death or injury. Adders disturbed at hibernation sites in winter may be killed by subsequent cold exposure or predation after failing to return to adequate hibernation sites. Their legal protection is poorly enforced, meaning many deaths go uninvestigated. Habitat loss and fragmentation prevents recolonisation of areas where local extinctions have occurred.

What You Can Do

Report suspected adder persecution to the police wildlife crime officer
Support ARG UK adder conservation and monitoring
Advocate for heathland management that creates varied structure for basking and refugia
Learn to identify and appreciate adders safely through Woodland Trust and ARG UK resources