Wild Dormouse Conservation and Welfare

The hazel dormouse is Britain's only native dormouse species and is in serious decline. Understanding its habitat needs and welfare challenges guides effective conservation and public support.

Key Facts

Hazel dormouse populations have declined by approximately 51% over the past 20 years in the UK
Dormice are strictly protected under the Wildlife and Countryside Act 1981 and European habitats regulations
Dormice hibernate from October to April or May, requiring dry, insulated nesting sites at ground level
Woodland edge habitats with diverse shrub layers including hazel, bramble, and honeysuckle are essential
Dormice are highly susceptible to cold weather during emergence from hibernation when food is scarce
The National Dormouse Monitoring Programme uses nest tubes to track populations across occupied sites
Dormice rarely descend to the ground, making them vulnerable to habitat fragmentation that breaks canopy connectivity

Welfare Considerations

Dormouse welfare is intimately linked to hibernation quality and food availability during active periods. Poorly insulated hibernation sites cause energy loss during cold periods, while early emergence into food-scarce conditions creates starvation risk. Habitat fragmentation that breaks canopy connectivity forces dormice to cross open ground, increasing predation risk. Conservation management that maintains diverse shrub layers, provides suitable hibernation habitat, and ensures canopy connectivity directly benefits individual dormouse welfare. Illegal disturbance of dormouse nest sites is prohibited and causes welfare harm through forced arousal from hibernation.

What You Can Do

Support People's Trust for Endangered Species dormouse conservation and monitoring programmes
Plant hazel, honeysuckle, and bramble in woodland gardens to provide dormouse foraging habitat
Install dormouse nest boxes in suitable woodland habitat with appropriate management
Report suspected illegal disturbance of dormouse nest sites to the relevant authorities
Participate in dormouse monitoring training through PTES to contribute to population surveillance