context source (Bermuda)Amos, E. J. R. (1991). A Guide to The Birds of Bermuda. 206 pp[details]
basis of recordBanks, R.C., R.W. McDiarmid, and A.L. Gardner. 1987. Checklist of vertebrates of the United States, the U.S. Territories, and Canada. U.S. Fish and Wildlife Service Resource Publication No. 166. 79 p.[details]
additional sourceRobbins, C. S. (1983). Golden field Guide to Birds of North America. Golden press. 360p.[details]
additional sourcePeterson, R.T.; Peterson, V.M. (2002). A field guide to the birds of eastern and central North America. Fifth Edition. Peterson Field Guide Series. Houghton Mifflin Company. New York. 427 p.[details]
additional sourceVanner, M. (2003). The encyclopedia of North American birds. Paragon Publishing. 1-383.[details]
additional sourceGallardo, J. C.; Macías, V.; Velarde, E. (2009). Birds (Vertebrata: Aves) of the Gulf of Mexico. In: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas. Pp. 1321–1342.[details]
additional sourceLiu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp. (look up in IMIS) [details] Available for editors
additional sourceIntegrated Taxonomic Information System (ITIS). , available online athttp://www.itis.gov[details]
Present Inaccurate Introduced: alien Containing type locality
Unreviewed
Baltic Sea
Gulf of Mexico
North Atlantic Ocean
Unreviewed
Diet seeds and roots of aquatic vegetation and shellfish [details] Dimensions Length: 52" (132 cm) [details] Distribution North America [details] Habitat lakes, ponds, and streams and often frequent salt water bays and estuaries [details]
Present 