Wildlife Welfare

Wild Dormouse Hibernation Conservation UK

Hazel dormice are among the UK's most vulnerable mammals. Hibernation disturbance and habitat loss threaten their survival.

Key Facts

Hazel dormice hibernate from October to April-May
They hibernate in nests at or below ground level
Disturbance during hibernation depletes critical fat reserves and can be fatal
Woodland management that maintains hazel understory supports populations
Population has declined by 70% since the 1990s in the UK

Welfare Considerations

Dormice disturbed during hibernation burn fat reserves they cannot replenish mid-winter. A single disturbance event can reduce survival probability significantly. Conservation work that protects hibernation sites and maintains connected woodland habitat protects both individual dormouse welfare and the viability of this vulnerable species.

What You Can Do

Support the People's Trust for Endangered Species dormouse conservation
Never disturb suspected dormouse hibernation nests
Advocate for hazel coppice restoration in woodland management
Join dormouse monitoring programs to support conservation data