The Noble Crayfish (Astacus astacus) is a widespread species, it has undergone significant declines in population numbers due to non-indigenous species, crayfish plague, habitat loss and over-harvesting. Estimates of rate of decline in Sweden, Finland and Norway are as high as 78%, ~20% and 61% respectively over a 3 generation length period. Similar rates of decline are being seen within a number of other countries. Globally, this species is estimated to be declining at a rate of 50-70%, however in some parts of its range numbers are stable and there have been some successful re-stocking programs so the true rate of decline may in fact be slightly lower (40 - 50%) thereby qualifying this species for a listing under Vulnerable under criterion A2ad.