White-clawed crayfish Austropotamobius pallipes

The White-clawed crayfish is a freshwater, bronze-coloured crustacean with pale undersides to its claws - hence the name. It is under threat from an invasive and introduced species of crayfish. Image: Bernard Dupont (Flickr). 

Find out more: iNaturalist, Suffolk Wildlife Trust, JNCC – Species description