The hazel dormouse has declined by over 70% in the UK since the 1990s, making it one of Britain's most endangered mammals and an urgent conservation priority.
Dormice woken from hibernation by mild weather expend critical fat reserves and may starve before natural food is available. Habitat fragmentation prevents movement between woodland patches, creating isolated populations vulnerable to local extinction. Woodland management that maintains hazel coppice and diverse shrub layers directly improves dormouse welfare and survival.