The Biosystematic Database of World Diptera, initiated by F. Christian Thompson and Thomas Pape, comprises detailed taxonomic classifications and bibliographic records of dipteran species, indicating a total estimate of 1.5 million species with 158,453 described. The database highlights the ecological importance of flies in pollination and other functions while addressing challenges in knowledge accessibility and the historical development of nomenclature standards. It also emphasizes the collaborative efforts in enhancing and consolidating scientific literature from various sources to provide comprehensive data on dipteran diversity.