Wild Hedgehog Hibernation: Welfare During Winter Dormancy

Hedgehog hibernation is a critical and vulnerable period during which inadequate preparation or disturbance can cause death, making garden management through autumn essential.

Key Facts

European hedgehogs hibernate from November to March in leaf piles, log stacks, and compost heaps
Hedgehogs need to reach at least 450-600g before hibernation to survive winter on fat reserves
Juvenile hedgehogs born late in the season may not reach sufficient weight and require intervention
Disturbance during hibernation forces hedgehogs to use precious fat reserves to rewarm and relocate
Climate change is disrupting hibernation timing, with hedgehogs waking too early and finding insufficient food

Welfare Considerations

Wild hedgehog hibernation welfare depends primarily on undisturbed access to appropriate hibernation sites with adequate leaf litter and log piles, and on reaching sufficient body weight in autumn. Lightweight juveniles in autumn can be supported with meaty cat food to build reserves. Never disturb hibernating hedgehogs — even brief wakening causes significant metabolic cost. Autumn garden tidying should be delayed until late October to preserve natural hibernation material.

What You Can Do

Leave areas of leaves, log piles, and dense vegetation undisturbed through winter as hibernation habitat
Supplement thin autumn hedgehogs with meaty cat or dog food and water to help them build winter weight
Never move or disturb a hibernating hedgehog — contact a wildlife rehabilitator if you find one in trouble
Delay autumn garden clearance until late October to preserve natural hibernation material