Urban Hedgehog Welfare: Navigating a Human-Dominated Landscape

Hedgehogs are declining across Europe at alarming rates, facing hazards including roads, garden chemicals, and habitat fragmentation in their urban and suburban ranges.

Key Facts

UK hedgehog populations have declined by approximately 50% since 2000; urban populations have declined less severely than rural ones
Road traffic kills an estimated 167,000–335,000 hedgehogs annually in the UK — a leading cause of unnatural mortality
Garden hazards include slug pellets (metaldehyde and ferric phosphate), bonfire piles, strimmers, and swimming pools without ramps
Hedgehogs hibernate from approximately November to March; disturbance during hibernation burns critical fat reserves
Garden connectivity — gaps in fences between gardens — allows hedgehog movement and is critical for foraging and mating

Welfare Considerations

Hedgehog welfare in urban environments is defined by a landscape of human-created hazards. Road strikes cause acute traumatic injury and death — the hedgehog's instinctive defense (rolling into a ball) is effective against predators but lethal against vehicles. Garden chemicals cause sublethal harm: metaldehyde slug pellets cause seizures and liver damage; insecticides reduce food availability by killing invertebrates. Strimmer injuries are horrific — hedgehogs resting in long grass receive severe lacerations when grass is cut. Hibernation disturbance by garden work or predator activity forces premature emergence when insufficient food is available, causing starvation. Swimming pools without exit ramps cause drowning. These are all preventable with minor behavioral changes.

What You Can Do

Create a 13cm gap in garden fences at ground level to enable hedgehog movement between connected gardens
Switch from metaldehyde slug pellets to ferric phosphate alternatives — safer for hedgehogs and other wildlife
Check long grass, compost heaps, and bonfire piles for hedgehogs before strimming or lighting
Add an exit ramp to garden ponds and swimming pools to prevent hedgehog drowning
Register your garden with the Big Hedgehog Map to contribute to population monitoring data