Population status

Trumpeter Swan
(Cygnus buccinator)

The Rocky Mountain, Pacific Coast, and Interior populations of Trumpeter Swans are all increasing in size (Groves 2017). This species is primarily monitored through the North American Trumpeter Swan Survey, although for canadian breeders, detailed trends are only available for the Pacific and Rocky Mountain populations. The only formal survey conducted in Canada of the Interior Population was in 2015, in Riding Mountain National Park, Manitoba, where 97 were recorded, a dramatic increase from the 49 counted in 2010 (Groves 2017). The Ontario component of the Interior population is estimated at, at least, 2,000 individuals (CWS Waterfowl Committee 2017). Each Trumpeter Swan population has a national population goal; all three populations 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/group	Goal	Lower level	Upper level
Trumpeter Swan	Mean abundance (2008-2012)	Goal minus 25%	Not applicable

British Columbia Coastal Waterbird Survey

Additional information on: British Columbia Coastal Waterbird Survey

View definitions of table column headings being used by: British Columbia Coastal Waterbird Survey

Table 1: Population trends by geographic area
Geographic area	Time Period	Annual Trend ^{Table 1 - footnote 1}	Limits
Geographic area	Time Period	Annual Trend ^{Table 1 - footnote 1}	Lower	Upper
British Columbia coast	1999-2016	-3.9	-10.5	3.1

North American Trumpeter Swan Survey

View definitions of table column headings being used by: North American Trumpeter Swan Survey

Table 2: Population trends by geographic area
Geographic area	Time Period	Annual Trend	Limits
Geographic area	Time Period	Annual Trend	Lower	Upper
Pacific coast population Select to view graph of the geographic area: Pacific coast population 1985-2015; North American Trumpeter Swan Survey	1985-2015	16.8	10.7	26.6
Rocky mountain population Select to view graph of the geographic area: Rocky mountain population 1968-2015; North American Trumpeter Swan Survey	1968-2015	11.8	10	14

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)
Groves, D.J. 2017. The 2015 North American Trumpeter Swan Survey: A Cooperative North American Survey. US Fish and Wildlife Service, Migratory Bird Management, Juneau, AK. 26 pp. Groves, D.J. 2017. The 2015 North American Trumpeter Swan Survey: A Cooperative North American Survey. US Fish and Wildlife Service, Migratory Bird Management, Juneau, AK. 26 pp. (Link)
Pacific Flyway Council. 2006. Pacific Flyway Management Plan for the Pacific Population of Trumpeter Swans. Pacific Flyway Study Committee, Subcommittee on Tundra Swans. Unpublished Report. [c/o USFWS, DMBM], Portland, OR, 30 pp.