The following collected guides break down how to recognize common fly species belonging to several families, with a focus on the diversity of North America.

Additional notes: The following notes were assembled over time on the identification of Diptera species, chiefly to facilitate photo/field ID e.g. on iNaturalist. These are less fully developed than those published above, but should be accessible to anyone sufficiently determined and patient. Feel free to reach out to the authors or editors with questions.

Please note that we most of the files linked in this site are hosted on personal Google Drives, and may disappear in the future if those personal accounts become inactive, et cetera. If you want insurance against this problem on your end, you can download some or all files from this folder: https://drive.google.com/drive/folders/1ruIJQxkBPspYO-BrObtUxCMMUFYrFFbP