Adder Welfare and Illegal Persecution

The adder is Britain only venomous snake and has declined significantly across its range, facing welfare threats from illegal killing driven by fear, habitat loss, and the fragmentation of heathland and grassland populations.

Key Facts

Adders have declined from an estimated 30,000 individuals in the 1980s to fewer than 2,000 today
They are legally protected under the Wildlife and Countryside Act; killing or intentionally injuring them is a criminal offence
Adder bites in Britain are very rarely fatal and almost always occur through deliberate handling or accidental treading
They emerge from hibernation from February in males, basking extensively in early spring before becoming less visible
Adder populations are highly fragmented on heathland and grassland remnants in southern and eastern England

Welfare Considerations

Adder welfare is severely compromised by illegal killing driven by fear and misconceptions about danger. Individuals found in gardens or countryside are frequently killed despite full legal protection. Habitat fragmentation isolates small populations that cannot exchange individuals, leading to inbreeding depression. Domestic cats kill adders with significant population-level welfare impacts at some sites. Climate change may alter hibernation timing and emergence dates in ways that affect reproductive success and prey availability.

What You Can Do

Never kill or disturb adders, which are fully protected; simply walk around them
Contribute adder sightings to Amphibian and Reptile Conservation Trust national records
Support heathland conservation and management that maintains suitable adder habitat
Educate children and adults about adder ecology to reduce fear-based persecution
Report suspected illegal adder killing to police wildlife crime units and ARC Trust