Hedgehog Decline in Britain: Causes and Conservation

Hedgehog populations in Britain have fallen by around 50% since 2000 in rural areas. Understanding the causes of decline is essential for effective conservation and welfare action.

Key Facts

UK hedgehog populations have declined from approximately 30 million in the 1950s to under 1 million today
Rural hedgehog populations have fallen by around 50% since 2000; urban populations have been more stable
Key decline drivers include habitat loss, agricultural intensification, road mortality, and loss of invertebrate prey
Badgers are a natural predator of hedgehogs — high badger density in some areas may suppress hedgehog populations
Hedgehogs hibernate between November and March, requiring suitable undisturbed leaf litter for nest sites
Garden fencing and walls create isolated habitat patches — hedgehog highways through gaps between gardens are vital
Slug pellets containing metaldehyde poison hedgehogs that eat affected molluscs — now banned in the UK
Hedgehog rescues handle thousands of underweight animals each autumn before hibernation

Welfare Considerations

Hedgehog welfare challenges span wild populations — where chronic food insecurity, road mortality, and habitat fragmentation cause widespread suffering — and individual animals in human care during rescue and rehabilitation. Underweight hedgehogs attempting hibernation face death from cold and starvation. Autumn juveniles weighing less than 600 grams should be supplemented before hibernation or overwintered in care. Garden management choices have measurable impacts on hedgehog survival — leaving areas wild, avoiding pesticides, and creating hedgehog highways between gardens are concrete welfare contributions that garden owners can make.

What You Can Do

Create a hedgehog highway by cutting a 13cm hole in garden fencing to allow movement between plots
Leave areas of your garden wild with leaf piles suitable for nesting and foraging
Avoid all pesticide use that reduces invertebrate prey or directly poisons hedgehogs
Check bonfires before lighting and long grass before strimming
Weigh any hedgehog found out in daylight in autumn — under 600g may need supplementary feeding
Donate to the British Hedgehog Preservation Society and your local hedgehog rescue centre