The White-clawed Crayfish (Austropotamobius pallipes) has been assessed as Endangered under criterion A2ce. In the last ten years this species is suspected to have undergone a decline of somewhere between 50 - 80% based on presence/absence data available for England, France and Italy. The situation in these countries is thought to be similar to that of the other countries in its range for which there is no population data. These global declines are largely attributed to the introduced crayfish (e.g. Signal Crayfish and Red Swamp Crayfish) and crayfish plague Aphanomyces astaci which are now found throughout this species entire range. This species is managed and protected by a number of international and national legislations, however these are limited in their capacity to prevent the further spread of non-native species. Population monitoring is urgently required within some of the other countries for which no data was available to determine at what rate this species is being lost from aquatic systems.