Wild Hedgehog Hibernation and Winter Welfare

Hedgehog hibernation is a critical period during which inadequate fat reserves, disturbance, and garden hazards can cause significant mortality and welfare problems.

Key Facts

Hedgehogs typically hibernate from November to March in the UK, though timing varies with temperature
A hedgehog needs at least 450-600g body weight to survive hibernation successfully
Juveniles born late in summer may be too light to survive winter without supplementary feeding
Disturbed hibernating hedgehogs waste critical energy reserves in warming up unnecessarily
Garden bonfires built in advance are frequently used as hibernation sites, leading to burning of hedgehogs
Mild winters cause hedgehogs to wake prematurely, burning reserves before spring prey is available

Welfare Considerations

Hedgehog hibernation welfare depends critically on adequate pre-hibernation fat reserves and undisturbed sites. Juveniles born to late litters are particularly vulnerable - found underweight in autumn, they require intervention or supplementary feeding to reach safe hibernation weight. Human hazards during winter include bonfire ignition without checking for hibernators, and strimmer use near log piles. Climate change complicating hibernation timing by causing premature arousal during mild spells represents a growing welfare challenge.

What You Can Do

Check bonfires for hibernating hedgehogs immediately before lighting by poking gently with a broom
Provide supplementary cat food (not fish-based) to underweight hedgehogs in autumn
Create hibernation habitat including log piles and hedgehog houses in undisturbed garden corners
Weigh found hedgehogs in autumn - those under 450g may need supplementary feeding or rescue care