 He was particularly interested in aspergillosis, a bronchial disease caused by mold that decimated flocks of wild sea ducks as he tried to acclimatize them to the freshwater park environment, but which Derscheid succeeded in curing.Derscheid's techniques were widely adopted and applied, most notably at the nature reserve in Zwin (Belgium), known for its collections of salt-resistant plants and an aviary specializing in wading birds.An obituary of Derscheid states