Police are hunting thieves who've stolen the caterpillars of Britain's biggest butterfly from their unique habitat in the Norfolk Broads.
It's feared they've been taken by illegal butterfly collectors who will wait for the Swallowtails to hatch before killing and displaying them. Natalie Gray reports :
Five milk parsley plants were taken from the Norfolk Wildlife Trust reserve at Hickling Broad. They would have been covered with rare swallowtail butterfly caterpillars feeding on them.