Wild Hedgehog Conservation: Garden Corridors and Urban Ecology

Garden hedgehogs are flagship species for urban wildlife conservation. Creating connected garden habitats and reducing hazards can make a measurable difference to local hedgehog populations and individual animal welfare.

Key Facts

Hedgehog populations in the UK have declined from 30 million in the 1950s to an estimated 500,000-1 million today
Gardens now cover more land in Britain than all nature reserves combined
Hedgehogs hibernate from November to March but may wake during mild spells, burning critical fat reserves
They can travel 1-2 miles per night and need connected habitat corridors to find food and mates
Hedgehog Street campaigns have created over 90,000 hedgehog highways in UK gardens
Ponds are a significant hazard — hedgehogs cannot climb out of straight-sided ponds and drown
Garden netting causes entanglement injuries and death — strimmer and lawnmower injuries are also common
Slug pellets containing metaldehyde or methiocarb are toxic to hedgehogs; ferric phosphate is safer

Welfare Considerations

Individual hedgehog welfare suffers through a combination of habitat loss, direct hazards, and malnutrition from reduced invertebrate prey. Entanglement in garden netting causes slow death from constriction. Drowning in ponds is preventable with exit ramps. Strimmer injuries cause traumatic wounds and death. Slug pellet poisoning causes internal hemorrhaging. Each of these hazards is entirely preventable. At the population level, disconnected garden habitats prevent hedgehogs from accessing the ranges they need for feeding, mating, and genetic diversity. The simple interventions of fence gaps, pond exits, reduced pesticide use, and careful garden management make gardens hospitable rather than hazardous.

What You Can Do

Cut a 13cm gap in garden fences to create hedgehog corridors between gardens
Install a pond ramp or exit point in any garden ponds with straight sides
Avoid metaldehyde slug pellets — use ferric phosphate alternatives or beer traps instead
Check for hedgehogs before mowing, strimming, or lighting bonfires
Leave an area of your garden wild with log piles and leaf heaps for shelter and foraging
Record hedgehog sightings on wildlife tracking apps to contribute to population monitoring