Population status

Ruddy Duck
(Oxyura jamaicensis)

In Canada the Ruddy Duck is primarily monitored in its core breeding area through the Waterfowl Breeding Population and Habitat Survey in western Canada, as well as the Waterfowl Breeding Population Survey of the Central Interior Plateau of British Columbia. The poulation of Ruddy Duck in the Canadian and United States Prairie regions show significantly increasing population trends over both the long and short-term, though the population is considered to have changed little relative to the 1970s. The reliability of this assessment is considered to be high. The Ruddy Duck is at an acceptable level relative to its national population goal. 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	Long-term average of the time series	10th 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

View definitions of table column headings being used by: Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

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
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-States	1955-2017	2.1	1.4	3
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-States	1955-2017	2.4	1.7	3.2
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-States	1955-2017	-0.5	-1.9	1.4

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.

View definitions of table column headings being used by: Waterfowl Breeding Population Survey of the Central Interior Plateau of B.C.

Table 2: Population trends by geographic area
Geographic area	Time Period	Annual trend ^{Table 2 - footnote 1} ^{Table 2 - footnote 2}	Limits
Geographic area	Time Period		Lower	Upper
British -Columbia Central Plateau	2006-2017	-4.4	-12.6	3.8

References

Brua, R.B. 2002. Ruddy Duck (Oxyura jamaicensis), version 2.0. In: The Birds of North America (P.G. Rodewald, ed.). Cornell Lab of Ornithology, Ithaca, New York, USA. Brua, R.B. 2002. Ruddy Duck (Oxyura jamaicensis), version 2.0. In: The Birds of North America (P.G. Rodewald, ed.). Cornell Lab of Ornithology, Ithaca, New York, USA. (Link)
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)