Awkerman, Jill A., David J. Anderson and G. Causey Whittow. 2008. Black-footed Albatross (Phoebastria nigripes), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/065 (页面存档备份,存于互联网档案馆)
Awkerman, Jill, David Anderson and G. Causey Whittow. 2009. Laysan Albatross (Phoebastria immutabilis), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/066 (页面存档备份,存于互联网档案馆)
Schreiber, E. A., R. W. Schreiber and G. A. Schenk. 1996. Red-footed Booby (Sula sula), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/241 (页面存档备份,存于互联网档案馆)
Schreiber, E. A. and R. L. Norton. 2002. Brown Booby (Sula leucogaster), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/649 (页面存档备份,存于互联网档案馆)
Marks, Emma J.; Rodrigo, Allen G.; Brunton, Dianne H. Ecstatic display calls of the Adélie penguin honestly predict male condition and breeding success. Behaviour. 2010, 147 (2): 165–184. JSTOR 40599645. doi:10.1163/000579509X12512863752751.
Marks, Emma J.; Rodrigo, Allen G.; Brunton, Dianne H. Ecstatic display calls of the Adélie penguin honestly predict male condition and breeding success. Behaviour. 2010, 147 (2): 165–184. JSTOR 40599645. doi:10.1163/000579509X12512863752751.
Cardoze, C. 10 June 2002. They're in love. They're gay. They're penguins… And they're not alone. Columbia University News. Retrieved 25 Jan. 2011 <Timeless Spirit Magazine. [2008-11-07]. (原始内容存档于2009-01-23).>
Awkerman, Jill A., David J. Anderson and G. Causey Whittow. 2008. Black-footed Albatross (Phoebastria nigripes), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/065 (页面存档备份,存于互联网档案馆)
Awkerman, Jill, David Anderson and G. Causey Whittow. 2009. Laysan Albatross (Phoebastria immutabilis), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/066 (页面存档备份,存于互联网档案馆)
Schreiber, E. A., R. W. Schreiber and G. A. Schenk. 1996. Red-footed Booby (Sula sula), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/241 (页面存档备份,存于互联网档案馆)
Schreiber, E. A. and R. L. Norton. 2002. Brown Booby (Sula leucogaster), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/649 (页面存档备份,存于互联网档案馆)
Cardoze, C. 10 June 2002. They're in love. They're gay. They're penguins… And they're not alone. Columbia University News. Retrieved 25 Jan. 2011 <Timeless Spirit Magazine. [2008-11-07]. (原始内容存档于2009-01-23).>