| Cygnus paloregonus|
Temporal range: Middle Pleistocene
|Left carpometacarpus from the hand of an extinct swan (Olor paloregonus = Cygnus paloregonus) from Oregon.|
| †Cygnus paloregonus|
Cygnus paloregonus is a fossil swan. It is an ancestor distantly allied to the mute swan. It is known from the Pleistocene from Fossil Lake, Oregon, Froman's Ferry, Idaho and from Arizona. It is referred to by Hildegarde Howard in Delacour's The Waterfowl of the World as "probably the mute type swan".
- Notes On Paleopathology. R. W. Shufeldt, M. D., Popular Science Monthly, Volume 42, March 1893 (link retrieved 9 April 2016)
- The Silver Lake of Oregon and its Region, E. D. Cope, The American Naturalist, Vol. 23, No. 275 (Nov., 1889), page 978 (Stable URL)
- Review: Shufeldt on Fossil Birds from Oregon. Reviewed Work: A Study of the Fossil Avifauna of the Equus Beds of the Oregon Desert by R. W. Shufeldt. Review by: J. A. A., The Auk, Vol. 10, No. 4 (Oct., 1893), page 344, doi:10.2307/4067816
- Brodkorb, Pierce (1964). "Catalogue of Fossil Birds: Part 2 (Anseriformes through Galliformes)". Bulletin of the Florida State Museum. 8 (3): 195–335.
- Review of the Fossil Fauna of the Desert Region of Oregon, with a Description of additional Material collected there. R. W. Schufeldt. Bulletin of the American Museum of Natural History, VoL. XXXII, Aut, VI, pages 123-178, New York, 1913 (link retrieved 9 April 2016)
- Cygnus paloregonus at the Paleobiology Database (retrieved 9 April 2016)
- Delacour, Jean Théodore. The Waterfowl of the World. pp. 262–265.