Water board calls for action to tackle American crayfish

A Dutch water board is calling for nationwide action to tackle the American crayfish, which has made its home in the Netherlands and is causing major damage to weirs and the banks of ditches and canals. Weirs allow water boards to manage the water table, but the crayfish are disrupting the process because their digging causes leaks, the Schieland en Krimpenerwaard water board told broadcaster NOS. “We can now determine the water level but if the weirs have holes in...