Population status

Barrow's Goldeneye
(Bucephala islandica)

The size of the Western population of Barrow’s Goldeneye is estimated at 250 000 individuals, while the Eastern population of Barrow’s Goldeneye is estimated at only 8 500 individuals. The Canadian portion of the Western population is primarily monitored through the Waterfowl Breeding Population Survey of the Central Interior Plateau of British Columbia, and the Eastern population is primarily monitored through the Eastern Population of Barrow’s Goldeneye Winter Survey. Both populations currently appear to be stable, however information for both populations is limited. Both populations are currently at an acceptable level relative to their national population 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/group	Goal	Lower level	Upper level
Canada	Not applicable	Not applicable	Not applicable
Eastern Population	Abundance required for de-listing (SARA)	Equal to goal	Not applicable
Western Population	Long-term average of the time series	10th percentile of observed abundance (1970-2012)	Not applicable

Cooperative Yukon roadside Waterfowl Breeding Population Survey

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Table 1: Population trends by geographic area
Geographic area	Time Period	Annual trend ^{Table 1 - footnote 1} ^{Table 1 - footnote 2}	Limits
Geographic area	Time Period		Lower	Upper
Southern Yukon Select to view graph of the geographic area: Southern Yukon 1991-2016; Cooperative Yukon roadside Waterfowl Breeding Population Survey	1991-2016	0	-2.3	0

British Columbia Coastal Waterbird Survey

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Table 2: Population trends by geographic area
Geographic area	Time Period	Annual Trend ^{Table 2 - footnote 1}	Limits
Geographic area	Time Period	Annual Trend ^{Table 2 - footnote 1}	Lower	Upper
British Columbia coast	1999-2016	-3.4	-5.9	-0.3

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.

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Table 3: Population trends by geographic area
Geographic area	Time Period	Annual trend ^{Table 3 - footnote 1} ^{Table 3 - footnote 2}	Limits
Geographic area	Time Period		Lower	Upper
British -Columbia Central Plateau	2006-2017	-1	-3.2	1.4

Eastern Population Barrow’s Goldeneye Winter Survey

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Table 4: Population trends by geographic area
Geographic area	Time Period	Annual Trend	Limits
Geographic area	Time Period	Annual Trend	Lower	Upper
Eastern Population Select to view graph of the geographic area: Eastern Population 2005-2017; Eastern Population Barrow’s Goldeneye Winter Survey	2005-2017	2.7	-0.8	3.5

References

Canadian Wildlife Service (CWS) Waterfowl Committee. 2017. Population Status of Migratory Game Birds in Canada: November 2017. CWS Migratory Birds Regulatory Report Number 49. 221 pp. Canadian Wildlife Service (CWS) Waterfowl Committee. 2017. Population Status of Migratory Game Birds in Canada: November 2017. CWS Migratory Birds Regulatory Report Number 49. 221 pp. (Link)
Robert, M. 2013. Barrow’s Goldeneye. pp. 190–194 In: Status of Quebec Waterfowl Populations, 2009. Lepage, C. and D. Bordage (eds). Technical Report Series No. 525, Canadian Wildlife Service, Environment Canada, Quebec City. xiii + 243 pp. Robert, M. 2013. Barrow’s Goldeneye. pp. 190–194 In: Status of Quebec Waterfowl Populations, 2009. Lepage, C. and D. Bordage (eds). Technical Report Series No. 525, Canadian Wildlife Service, Environment Canada, Quebec City. xiii + 243 pp. (Link)
Robert, M., B. Drolet, and J.-P.L. Savard. 2008. Habitat Features Associated with Barrow’s Goldeneye Breeding in Eastern Canada. Wilson Journal of Ornithology 120: 320–330.