Britain's largest butterfly at risk as fungal pathogens kill food source

Drastic die-back of milk parsley on Norfolk Broads threatens future of swallowtailBritain's largest butterfly may be at risk from fungal pathogens that have caused a drastic die-back of the rare plant on which its caterpillars feed.The swallowtail is only found breeding at 16 sites in Britain, all on the Norfolk Broads where milk parsley grows. Continue reading...