Bucephala islandica (Barrow's Goldeneye)
- Photos and a brief narrative on this species.
- http://www.iceland-nh.net/birds/data/Bucephala-islandica/bucephala_islandica.html

Bucephala albeola (Bufflehead)
- Description and a photo of this small North American diving duck.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Bucephala_albeola.html

Common Goldeneye (Bucephala clangula)
- Species account includes range maps, photos, identification tip, and the life history of this bird.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i1510id.html

Bufflehead (Bucephala albeola)
- Describes the difference between the male, female, and juvenile of this species. Includes a photo.
- http://www.aquatic.uoguelph.ca/birds/speciesacc/accounts/ducks/albeola/account.htm

Goldeneye (Bucephala clangula)
- Photo, European distribution map, videos, and facts.
- http://www.birdguides.com/html/vidlib/species/Bucephala_clangula.htm