Wild Hedgehog Road Ecology and Crossing Structures

Road mortality is a leading cause of hedgehog death, and wildlife crossing structures, road signage, and driver education can meaningfully reduce the welfare burden of road-killed hedgehogs.

Key Facts

An estimated 100,000-335,000 hedgehogs are killed on UK roads annually
Hedgehogs are most active at night and are attracted to road verges by the invertebrate prey they support
Hedgehog culverts (small tunnels under roads) have been shown to restore hedgehog movement across fragmented habitat
Wildlife fencing directing hedgehogs toward culverts is essential — unguided culverts have low utilisation rates
Wildlife-vehicle collision recording schemes including Project Splatter map road kill hotspots to inform mitigation
Driver speed is a significant factor — lower urban speeds give hedgehogs more chance of escape and drivers more response time

Welfare Considerations

Road mortality causes traumatic death for hundreds of thousands of hedgehogs annually. Individual hedgehogs struck by vehicles suffer traumatic injuries; those not killed outright may crawl injured to road edges where they die without assistance. The landscape-scale effect of road mortality — fragmenting hedgehog populations into isolated sub-populations that cannot exchange individuals for breeding — creates cumulative population welfare harm beyond the direct welfare cost of individual road deaths. Hedgehog crossing structures restore landscape connectivity that allows populations to function as larger, more viable units. Project Splatter road kill data enables targeted mitigation at identified hotspots, directing limited resources to the locations where they have the greatest welfare impact.

What You Can Do

Drive carefully at night in rural and suburban areas where hedgehogs are active, particularly May-October
Report hedgehog road kills to Project Splatter to contribute data for hotspot identification
Advocate to your local council for hedgehog culverts at identified road-kill hotspots in your area
Install hedgehog highways in garden fences — reducing the need for hedgehogs to navigate roads between gardens is a direct welfare benefit