Colin Varndell / Dormouse (Muscardinus avellarius) pregnant female, Dorset, UK July.

David Kjaer / Common dormouse (Muscardinus avellanarius) in nest box, Wiltshire, England, UK, May.

Kim Taylor / Hazel Dormouse (Muscardinus avellanarius) in Wychelm tree in early spring. Italy, April.

Kerstin Hinze / Hazel dormice (Muscardinus avellanarius), together in one nest, Harz, Saxony-Anhalt, Germany, June.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius), adult male, climbing on flowering Honeysuckle, Germany, June.

Ann & Steve Toon / Hazel dormouse (Muscardinus avellanarius), in researcher's hand, Nottinghamshire, UK, June

Ann & Steve Toon / Hazel dormouse (Muscardinus avellanarius) nestboxes, used in reintroduction project, Nottinghamshire, UK, June .

Ann & Steve Toon / Hazel dormouse (Muscardinus avellanarius), in researcher's hand, Nottinghamshire, UK, June

Kerstin Hinze / Common dormouse (Muscardinus avellanarius), adult on bramble branch with blackberries. captive.

Kerstin Hinze / Hazel dormouse (Muscardinus avellanarius) nest box filled with hazel nuts, Harz, Saxony-Anhalt, Germany, September.

Colin Varndell / Dormouse (Muscadinus avellarius) at night, Dorset, UK, July.

Colin Varndell / Dormouse (Muscardinus avellanarius) on cherry branch at dusk, Dorset, UK, July.