Great Blue Heron (Ardea herodias), Chicks, and Nest - PC-82, ©1991, Box: 5, Folder: 23, item: 1. 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/310585 Accessed June 19, 2025.