Wild Hedgehog Road Mortality: Scale and Mitigation

Road mortality is the leading documented cause of hedgehog death in the UK. Understanding the scale of the problem and effective mitigation helps target conservation effort most effectively.

Key Facts

An estimated 100,000-335,000 hedgehogs are killed on UK roads each year
Hedgehogs are particularly vulnerable because they curl into a ball rather than fleeing approaching vehicles
Roads fragment hedgehog territories, reducing genetic connectivity between populations
Hedgehog tunnels under roads allow safe crossing without road surface exposure
Speed reductions on rural roads at night reduce hedgehog mortality in high-risk areas
Hedgehog mortality rates are highest on A-roads and dual carriageways with high vehicle speeds
Citizen science road casualty recording by groups like Mammals on Roads provides population decline data

Welfare Considerations

Road-killed hedgehogs represent individual animals experiencing sudden traumatic death - a welfare harm to individuals but also a significant population-level impact given the current conservation crisis facing the species. Hedgehogs that are struck but not killed may survive with severe injuries that are rarely treated. The rolling defence behaviour that served hedgehogs well against predators is catastrophically maladaptive against vehicles. Infrastructure solutions including tunnels and speed reduction address the structural cause rather than requiring behavioural change from hedgehogs.

What You Can Do

Record hedgehog road casualties using the Mammals on Roads app to contribute population monitoring data
Advocate for hedgehog tunnels in new road construction and major road upgrades in hedgehog areas
Support 20mph zone campaigns in residential areas which reduce hedgehog road mortality
Create garden hedgehog corridors so hedgehogs can reach food and nesting sites without crossing roads