We thank Chelsey Ritner, Tevan Brady, Jessica Mullins, and Jesse Walker for their assistance with image processing, data uploading, and document curation. We are grateful to Harold Ikerd and Terrence Walters for providing guidance and support throughout the development of this tool. We appreciate Sam Droege allowing us to use some definitions from the “Handy Bee Manual” in the glossary. We thank the following curators and museums for the loan of specimens used to produce this tool: Michael Engel and Jennifer Thomas (Snow Entomological Museum Collection, University of Kansas), Jerome Rozen, James Carpenter, and Corey Smith (American Museum of Natural History), and Stefan Fuchs (J.W. Goethe-Universität Frankfurt). We thank the beta testers for their helpful comments and suggestions: Chris Looney, Sam Droege, Kim Huntzinger, Luciana Musetti, Gino Nearns, Zach Portman, and James Zahniser.