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 the non-native invasive American signal crayfish. Image: © tizianopascutto, iNaturalist. 

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