Short description of Butterflies of North America Screen Saver and Wall 3.3: The Butterflies of North America Screen Saverr and Wallpaper rotates 60 close-up photos of colorful butterflies. All butterflies have been seen north of Mexico, as verified by the North American Butterfly Association's butterfly checklist. Optional captions let you display both the common and scientific names of each insect in your choice of font and screen position. You can enjoy this nag-free trial version for up to two weeks.