Population status

Canvasback
(Aythya valisineria)

The Canvasback is primarily monitored in its core breeding area in western Canada mainly through the Waterfowl Breeding Population and Habitat Survey. Canvasback breeding populations have increased since the 1990s and have remained at an acceptable level relative to the species' North American Waterfowl Management Plan objective since then (North American Waterfowl Management Plan 2012). These increased population levels have coincided with the return of favourable wetlands conditions in the Prairies. Detailed information on the population status of waterfowl species is available in the Population Status of Migratory Game Birds in Canada report (summarized version). To obtain a copy of the full version of this report, including tables and graphs, please contact ec.scf-oismiggibiers-cws-miggamebirds.ec@canada.ca.

 

Population goal and acceptable levels of variation

Species/groupGoalLower levelUpper level
CanadaLong-term average of the time series10th percentile of observed abundance (1970-2012)Not applicable

Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Additional information on: Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Table 1: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 1 - footnote 1   Table 1 - footnote 2 Limits
LowerUpper
Total survey area Select to view graph of the geographic area: Total survey area 1955-2017; Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States1955-20170.7-0.21.2
Canadian Prairies Select to view graph of the geographic area: Canadian Prairies 1955-2017; Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States1955-20171.20.81.6
Western Boreal Forest Select to view graph of the geographic area: Western Boreal Forest 1955-2017; Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States1955-2017-0.7-2.40.2
 

British Columbia Coastal Waterbird Survey

Additional information on: British Columbia Coastal Waterbird Survey

Table 2: Population trends by geographic area
Geographic areaTime PeriodAnnual Trend Table 2 - footnote 1 Limits
LowerUpper
British Columbia coast1999-2016-40-52-27.3
 

Cooperative Yukon roadside Waterfowl Breeding Population Survey

Additional information on: Cooperative Yukon roadside Waterfowl Breeding Population Survey

Table 3: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 3 - footnote 1   Table 3 - footnote 2 Limits
LowerUpper
Southern Yukon Select to view graph of the geographic area: Southern Yukon 1991-2016; Cooperative Yukon roadside Waterfowl Breeding Population Survey1991-2016-0.2-0.8-0.1
 

Waterfowl Breeding Population Survey of the Central Interior Plateau of B.C.

Additional information on: Waterfowl Breeding Population Survey of the Central Interior Plateau of B.C.

Table 4: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 4 - footnote 1   Table 4 - footnote 2 Limits
LowerUpper
British -Columbia Central Plateau2006-2017-13.5-22.4-3.6
 

References