Nick Upton / Roger Trout and Jia Min Lim with an Edible / Fat Dormouse (Glis glis) excavated from its winter hibernation burrow in woodland where this European species has become naturalised, Buckinghamshire, UK,...

Nick Upton / Radio-collared Edible / Fat Dormouse (Glis glis) being taken from its winter hibernation burrow during a survey in woodland where this European species has become naturalised, Buckinghamshire, UK, Apr...

Nick Upton / Roger Trout and Jia Ming Lim excavating the hibernation burrow of an Edible / Fat Dormouse (Glis glis) in woodland where this European species has become naturalised, Buckinghamshire, UK, April, Mode...

Nick Upton / Sleepy Edible / Fat Dormouse (Glis glis) excavated from its winter hibernation burrow being weighed during a survey in woodland where this European species has become naturalised, Buckinghamshire, UK,...

Nick Upton / Roger Trout and Jia Ming Lim fitting an exit tube to the hibernation burrow of an Edible / Fat Dormouse (Glis glis) after replacing it during a survey in woodland where this European species has beco...

Nick Upton / Exit tube fitted to the hibernation burrow of an Edible / Fat Dormouse (Glis glis) after replacing it during a survey in woodland where this European species has become naturalised, Buckinghamshire,...

Nick Upton / Researcher placing small mammal trap in field enclosure to survey Harvest mice (Micromys minutus) after release, Moulton, Northampton, UK, June. Model released.