Population status

Blue-winged Teal
(Spatula discors)

The Blue-winged Teal population is monitored primarily in its core breeding range through the Waterfowl Breeding Population and Habitat Survey (WBPHS) in western Canada, as well as the Waterfowl Breeding Population Survey of the Central Interior Plateau of British Columbia. The species is also monitored outside of the WBPHS by the Southern Ontario Waterfowl Plot Survey. The Blue-winged Teal is experiencing increasing population trends in almost all surveyed areas (North American Waterfowl Management Plan 2012), except in Southern Ontario and Quebec (CWS Waterfowl Committee 2017). The two populations of Blue-winged Teal are at an acceptable level relative to their North American Waterfowl Management Plan goals. 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
CanadaNot applicableNot applicableNot applicable
Eastern PopulationLong-term average of the time seriesEqual to goalNot applicable
Western PopulationLong-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-States1955-20171.51.21.7
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-States1955-20171.81.52.1
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-States1955-2017-0.1-0.80.6
 

Cooperative Yukon roadside Waterfowl Breeding Population Survey

Additional information on: Cooperative Yukon roadside Waterfowl Breeding Population Survey

Table 2: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 2 - footnote 1   Table 2 - footnote 2 Limits
LowerUpper
Southern Yukon Select to view graph of the geographic area: Southern Yukon 1991-2016; Cooperative Yukon roadside Waterfowl Breeding Population Survey1991-2016-0.4-1.5-0.4
 

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 3: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 3 - footnote 1   Table 3 - footnote 2 Limits
LowerUpper
British -Columbia Central Plateau2006-20174-2.110.5
 

Southern Ontario Waterfowl Plot Survey

Additional information on: Southern Ontario Waterfowl Plot Survey

Table 4: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 4 - footnote 1   Table 4 - footnote 2 Limits
LowerUpper
Southern Ontario Select to view graph of the geographic area: Southern Ontario 1971-2017; Southern Ontario Waterfowl Plot Survey1971-2017-11.4-15.2-7.5
 

References