Adder Welfare and Heathland Conservation

The adder is Britain's only venomous snake and is declining across much of its range, with welfare tied to heathland and grassland habitat quality.

Key Facts

UK adder population estimated at 250,000-500,000 — declining significantly since 1990s
Require south-facing banks and clearings for basking — thermoregulation is critical
Feed primarily on field voles, lizards and frogs — prey availability affects body condition
Legally protected under Schedule 5 of the Wildlife and Countryside Act since 1981
Human persecution through deliberate killing remains a significant mortality cause

Welfare Considerations

Adder welfare is threatened by habitat degradation and deliberate human persecution despite legal protection. Dense vegetation that prevents basking reduces body temperature, impairing digestion, immune function and reproduction. Heathland management to maintain open, bare-ground patches with scrub for shelter provides essential habitat structure. Human attacks on adders — driven by fear — cause pain and death to protected animals. Education and awareness significantly reduce persecution rates.

What You Can Do

Never harm adders — they are legally protected and bites are very rare without provocation
Support heathland management maintaining open basking areas for reptiles
Report suspected adder persecution to police and local wildlife crime officers
Contribute adder sightings to local reptile recording groups and national surveys
Advocate for education programmes that reduce fear-based persecution of adders and other snakes