Bactrocera zonata (peach fruit fly) sometimes overlaps in terms of distribution with Bactrocera dorsalis (Oriental fruit fly). A technical leaflet to help to discriminate among these two invasive pest species, was updated and produced in?Arabic,?Chinese,?English,?French,?Portuguese, and?Spanish. The leaflet will be useful for countries and regions where these species are present or at risk of incursion helping to implement the recommended emergency response and is now available to regulatory agencies, surveillance and identification staff, growers of horticultural products and other stakeholders. It was prepared by Marc De Meyer (Royal Museum for Central Africa, Belgium) and Ian White (formerly research associate Natural History Museum, UK).