Prothonotary warbler, male, feeding young in hollow cypress knee (flashlight), May 17, 1930

Prothonotary warbler, male, feeding young in hollow cypress knee (flashlight), May 17, 1930, Container: Series VII: Box 18A, Folder: 110. Francis Harper papers, MS 245. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/533880 Accessed February 25, 2026.