Actual ranges may, in many cases, be more expansive than noted, but North Dakota is well known as a transition state where many of the Sphingidae common to the eastern United States encounter the western-most limits of their respective ranges. Western U.S. species begin appearing in western N.D. counties.
Clicking on a scientific name will take you to a file with pictures and/or information. I have used color coding and the first letter of the species name to make map/list correlation a bit easier. Map format is also a left to right, top to bottom sequence in relation to the lists, which are divided into respective tribes. The strays and rarities are not posted to the map, because it is unlikely you will encounter them, and, if you do, it could be anywhere.
Hyles euphorbiae, courtesy of Renae and Megan Seeley,