Monarch Caterpillar (Danaus plexippus) on Milkweed Leaf from “Busy Bugs” by Ada & Frank Graham - BK-4, ©1983, Box: 5, Folder: 6, item: 3. Natural History Art and Illustration by D. D. Tyler, MS 337. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/310489 Accessed June 24, 2025.