Wildlife

Grass Snake: Aquatic Predator of Ponds and Wetlands

Grass snakes are Britains largest snake and depend on wetland habitats and compost heaps for breeding.

Key Facts

Grass snakes are the largest British snake reaching up to 150 centimetres in length
They lay eggs in warm compost heaps, rotting vegetation, and south-facing banks
Grass snakes are strong swimmers and feed mainly on frogs and newts
They play dead convincingly if threatened but are entirely harmless
UK population has declined significantly from loss of ponds and wetlands

Welfare Considerations

Grass snakes face welfare threats from loss of ponds and wetlands that reduce their amphibian prey and eliminate egg-laying sites. Road mortality is significant particularly near ponds during breeding migrations. Agricultural intensification that removes hedgerows and rough margins reduces shelter and prey. Persecution through deliberate killing occurs despite legal protection.

What You Can Do

Create a compost heap or log pile as a warm egg-laying site for grass snakes
Maintain or restore garden ponds as habitat for frogs that grass snakes prey upon
Never kill or disturb grass snakes and educate others about their harmless nature
Report deliberate killing of grass snakes to police wildlife officers
Support pond restoration projects that benefit both grass snakes and amphibians