UK Wildlife

UK Adder Conservation

The adder is Britain's only venomous snake, now declining significantly and in need of conservation attention, dependent on warm heathland and grassland habitats with structural diversity.

Key Facts

Adder populations have declined by around 25% in recent surveys
Found on heathland, moorland edge, rough grassland, and woodland rides
Requires basking sites and cool retreats within short distances of each other
Hibernates from October to February in communal hibernation sites
Adder bites are rarely fatal to healthy adults but require medical attention

Welfare Considerations

Adder welfare and conservation requires habitat management that maintains the structural diversity of basking sites, retreats, and foraging areas. Persecution through killing by members of public is illegal but continues. Education about adders as a valuable and harmless neighbour reduces persecution.

What You Can Do

Never kill adders which are legally protected and rarely dangerous if left alone
Support heathland management that maintains adder habitat diversity
Record adder sightings through ARG UK surveys to contribute to population monitoring