The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

• 1999. "United States Endangered Species Act" (On-line). Accessed July10, 2000 at http://www.wcmc.org.UK.
• B., Bruun., & S. Baha El Din.   (1985).  Common Birds of Egypt, The American University in Cairo Press, Cairo..  
• Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes. 2003. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
• Banks, R. C., R. W. McDiarmid, and A. L. Gardner. 1987. Checklist of Vertebrates of the United States, the U.S. Territories, and Canada. Resource Publication, no. 166. 79
• Bennett and Harvey (1987) Active and resting metabolism in birds: allometry, phylogeny and ecology. J Zool, 213:327–363.
• BirdLife International 2009. Anas clypeata
• Dobkin, E., D. Wheye. 1988. The Birder’s Handbook. Simon and Schuster Inc.
• Farrand, J. 1988. An Audubon Handbook Western Birds. New York, N.Y.: McGraw-Hill Book Company.
• Gill, Frank, and Minturn Wright. 2006. Birds of the World: Recommended English Names. ix + 259
• Gooders, J., T. Boyer. 1986. Ducks of North America and the Northern Hemisphere. New York, N.Y.: Dragon's World.
• John Dunning (2008) CRC Handbook of Avian Body Masses. CRC Press: Boca Raton.
• John Terres (1980) The Audubon Society Encyclopedia of North American Birds. Knopf: New York.
• Johnsgard, P. 1965. Handbook of Waterfowl Behavior. Cornell University.
• M., Tharwat.   (1997).  ‘Birds Known to occur in Egypt’, National Biodiversity Unit, no. 8, Egyptian Environmental Affairs Agency, Cairo..  
• Moller (2006) Sociality, age at first reproduction and senescence: comparative analyses of birds. J Evol Biol, 19:682-689.
• R., Porter., & D. Cottridge.   (2000).  Birds of Egypt and the Middle East, The American University in Cairo Press, Cairo..  
• Robbins, C., B. Bruun, H. Zim. 1983. A Guide to Field Identification. Racine, Wisconsin: Western Publishing Company, Inc..
• S., Baha El Din., J. Hobbs., W. Mullie., S. Goodman., & P. Meininger.   (1989).  The Birds of Egypt, Oxford University Press, New York..  
• Soothill, E., P. Whitehead. 1978. Wildfowl of the World. Blanford Press Ltd..
• The Birds of North America Online (Online source)
• Todd, F. 1979. Waterfowl, Ducks, Geese, and Swans of the World. Seaworld Inc..