Select map overlays Admin Regions Bird Conservation Regions Blocks Coordinates Ecoprovinces Cities and Roads
[Close]
Redhead, Laure Wilson Neish
Photo © Laure Wilson Neish

Photo: Laure Wilson Neish
Breeding evidence - Redhead
Breeding evidence
Probability of observation - Redhead
Probability of observation
Elevation plot - Redhead
Elevation plot

Click for a larger version or to add map overlays

Redhead
Aythya americana
Landscape associations:

Click on plot to view table of mean abundance
Elevation range:
329 - 1088 m
Conserv. status:
Not at risk
Global importance
of B.C. population:
7
Number of squares
ConfirmedProbablePossiblePoint counts
29 40 38 10
Long-term BBS trends
RegionYearsTrend (conf. interv.) Reliab.
Brit. Col.1970 - 2012 -1.45 (-6.95 - 4.03)Low
Canada1970 - 2012 2.66 (0.48 - 4.89)Medium

Mean abundance by region

Bird Conservation Regions [plot]
NW Interior ForestBoreal Taiga PlainsGreat BasinNorthern RockiesN. Pacific Rainforest
   0.330.08  
Ecoprovinces [plot]
N. Boreal Mountains Taiga Plains Boreal Plains Georgia Depression Sub-Boreal Interior
       
S. Interior Mountains Central Interior Southern Interior S. Alaska Mountains Coast & Mountains
0.010.17 0.33   

Mean abundance by habitat [plot]

Boreal Altai Fescue AlpineBoreal White and Black SpruceBunchgrassCoastal Douglas-fir
  0.5 
Coastal Mountain-heather AlpineCoastal Western HemlockEngelmann Spruce -- Subalpine FirInterior Cedar -- Hemlock
    
Interior Douglas-firInterior Mountain-heather AlpineMontane SpruceMountain Hemlock
0.2 0.01 
Ponderosa PineSpruce -- Willow -- BirchSub-Boreal Pine -- SpruceSub-Boreal Spruce
  0.13 

Characteristics and Range Sometimes confused with the slightly larger Canvasback, the Redhead is the more common breeder of the two species in British Columbia. Although females generally make their own nests, they have the distinction of regularly laying eggs in the nests of other Redheads or those of other species, especially their close relative the Canvasback. Restricted to North America, the Redhead breeds mainly in prairie potholes and marshes in southwestern Canada and western United States, with scattered disjunct populations elsewhere (Woodin and Michot 2002). Wintering birds are concentrated in coastal wetlands of the Gulf of Mexico, but can be found across much of much of western North America north to southern British Columbia.

Distribution, Abundance, and Habitat Breeding of Redhead is concentrated in the Central Interior, Southern Interior, Southern Interior Mountains and Boreal Plains ecoprovinces, with a few records in other interior regions. The Probability of Observation map shows a similar pattern. Redhead breeding is concentrated in the 500-1,500 m elevation range. The geographical breeding distribution and elevation range from the Atlas closely match those in The Birds of British Columbia, suggesting no major change in distribution since the 1980s.

Redheads are highly flexible in diet, foraging methods and habitat (Woodin and Michot 2002). While breeding they eat aquatic invertebrates (mainly insects and snails) and the tubers, seeds and other parts of aquatic plants. They feed by diving, upending or taking food at the surface, in a wide range of aquatic habitats, generally 1-3 m deep. Females build nests over water in dense emergent vegetation, e.g., Cattail (Typha latifolia), or bulrush (Scirpus) species, usually close to open deeper water. Around Riske Creek in British Columbia, Savard et al. (1994) found no strong indicators of habitat preferences by breeding Redheads, apart from avoidance of the shallower ponds.

Conservation and Recommendations With a widespread and large population, the Redhead is not considered to be at risk. Although widely fluctuating, the continental population of the Redhead is generally above half a million breeding birds (Woodin and Michot 2002) and has averaged over 1 million birds since 2007 (CWS Waterfowl Committee 2013). There has also been some range expansion (e.g., into Alaska) during this period (Woodin and Michot 2002). The Atlas data will be useful for tracking changes in abundance or distribution of this apparently adaptable species in British Columbia.

Alan E. Burger

Recommended citation: Burger, A.E. 2015. Redhead in Davidson, P.J.A., R.J. Cannings, A.R. Couturier, D. Lepage, and C.M. Di Corrado (eds.). The Atlas of the Breeding Birds of British Columbia, 2008-2012. Bird Studies Canada. Delta, B.C. http://www.birdatlas.bc.ca/accounts/speciesaccount.jsp?sp=REDH&lang=en [10 Dec 2018]

Bird Studies Canada Privacy Policy | Accessibility Policy
British Columbia Breeding Bird Atlas, Bird Studies Canada, 5421 Robertson Road Delta, BC V4K 3N2 Canada
Phone: 1-877-592-8527 E-mail: bcbirdatlas@bsc-eoc.org
Banner photo: Glenn Bartley