Hazel Dormouse Muscardinus avellanarius

Hazel dormice have golden-brown fur and large black eyes and, distinctively, they are the only small British mammal with a furry tail. They are nocturnal and spend almost all of their time in the branches of trees during the summer, rarely coming down to the ground. Image: Frank Vassen (Flickr).

Find out more: The Mammal Society, Suffolk Wildlife Trust, People's Trust for Endangered Species, iNaturalist