Hazel dormice are one of Britain’s most enigmatic species, but they are hard both to find and study. This is because they are small, they live in the tree and shrub canopy when active and they come out at night. They are also closely associated with old, managed woodlands, where they live, and with hedgerows, that they use as dispersal corridors.   People’s Trust for Endangered Species (PTES) has been the lead conservation charity helping hazel dormice and we…