Monarch Butterfly Metamorphosis (Danaus plexippus) - PC-87, ©1991, Box: 5, Folder: 27, item: 4. 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/310602 Accessed June 23, 2025.