Editing Canvasback (section)

==Conservation==
Populations have fluctuated widely. Low levels in the 1980s put the canvasback on lists of special concern, but numbers increased greatly in the 1990s.<ref name=BNA>{{cite book |last=Mowbray |first=T. B. |editor1-last=Poole |editor1-first=A. |editor2-last=Gill |editor2-first=F. |title=The Birds of North America |chapter=Canvasback (''Aythya valisineria'') |number=659 |volume=17 |year=2002 |location=Philadelphia, PA |publisher=The Birds of North America, Inc.}}</ref> The canvasback is particularly vulnerable to drought and wetland drainage on the prairies of North America.<ref name="DUCB"/>

Many species of ducks, including the canvasback, are highly [[Bird migration|migratory]], but are effectively conserved by protecting the places where they nest, even though they may be hunted away from their breeding grounds.<ref name="iucn status 12 November 2021" /> Protecting key feeding and breeding grounds is key for conserving many types of migratory birds.{{Citation needed|date=January 2021}}