Population status

Common Goldeneye
(Bucephala clangula)

In Canada, the Common Goldeneye is monitored through the Waterfowl Breeding Population Habitat Survey (WBPHS) and the Eastern Wasterfowl Breeding Ground Survey (EWS). However, during these fixed-wing surveys, Common Goldeneyes cannot be distinguinshed from Barrow’s Goldeneyes, and both species are counted as goldeneyes, without distinction, although most birds observed during the WBPHS and the EWS are Common Goldeneye (Baldassarre 2014). The goldeneye population trend in Canada is relatively stable over the long-term (1961-2017), although it has been increasing significantly in the Canadian Prairies, while it has been decreasing in the Western Boreal Forest. Part of the EWS is conducted by helicopter, during which it is possible to distinguish both species. Results from the EWS helicopter plot surveys indicate a relatively stable population trend in most surveyed areas for this species. The North American population of Common Goldeneye has been estimated approximately at 1.2 million birds (North American Waterfowl Management Plan 2012). Both western and eastern Common Goldeneye populations have a national population goal and are at an acceptable level relative to their respective 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 series10th percentile of observed abundance (1970-2012)Not applicable
Western PopulationLong-term average of the time series10th percentile of observed abundance (1970-2012)Not applicable

British Columbia Coastal Waterbird Survey

Additional information on: British Columbia Coastal Waterbird Survey

Table 1: Population trends by geographic area
Geographic areaTime PeriodAnnual Trend Table 1 - footnote 1 Limits
LowerUpper
British Columbia coast1999-20160.1-1.62.3
 

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 2: Population trends by geographic area
Geographic areaTime PeriodAnnual trend Table 2 - footnote 1   Table 2 - 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-States1955-2017-0.4-0.80.1
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-States1955-20172.20.73.1
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-States1955-2017-0.8-1.4-0.3
 

Eastern waterfowl breeding ground survey

Additional information on: Eastern waterfowl breeding ground survey

Table 3: Population trends by geographic area
Geographic areaTime PeriodAnnual Trend Table 3 - footnote 1 Limits
LowerUpper
Total survey area Select to view graph of the geographic area: Total survey area 1990-2017; Eastern waterfowl breeding ground survey1990-20170.4-0.71.5
Atlantic Highlands Select to view graph of the geographic area: Atlantic Highlands 1990-2017; Eastern waterfowl breeding ground survey1990-2017-0.2-3.52.9
Eastern Boreal Shield Select to view graph of the geographic area: Eastern Boreal Shield 1990-2017; Eastern waterfowl breeding ground survey1990-2017-0.7-2.81.1
Central Boreal Shield Select to view graph of the geographic area: Central Boreal Shield 1990-2017; Eastern waterfowl breeding ground survey1990-20171.40.42.4
Western Boreal Shield Select to view graph of the geographic area: Western Boreal Shield 1990-2017; Eastern waterfowl breeding ground survey1990-20171.40.32.5
 

References