Editing Canvasback (section)

==Migration==
The canvasback migrates through the [[Mississippi Flyway]] to wintering grounds in the mid-Atlantic United States and the [[Lower Mississippi River|Lower Mississippi Alluvial Valley (LMAV)]], or the [[Pacific Flyway]] to wintering grounds along the coast of [[California]]. Historically, the [[Chesapeake Bay]] wintered the majority of canvasbacks, but with the recent loss of [[submerged aquatic vegetation]] (SAV) in the bay, their range has shifted south towards the LMAV. [[Brackish]] [[Estuary|estuarine]] bays and marshes with abundant submergent vegetation and [[invertebrates]] are ideal wintering habitat for canvasbacks.<ref name=DUCB/> A small number of birds are also known to have crossed the Atlantic, with several sightings being recorded in the [[United Kingdom]]. In December 1996, a canvasback was observed in a quarry in [[Kent]], which was followed by an additional sighting in [[Norfolk]] in January 1997. At least five more sightings have since been confirmed in England.<ref name=BritishBirds>{{cite journal|last=Larkin|first=Paul|author2=Mercer, David|title=Canvasback in Kent: new to Britain|journal=British Birds|date=March 2004|volume=97|pages=139–144|issn=0007-0335}}</ref>