Contents of report
Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
Alerts
Summary
What the categories mean
Return to BTO Home Page
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TUFTED DUCK Aythya fuligula
 
Conservation Listings Long term trend

Unlisted/Green
Biodiversity Steering Group
Conservation Concern List

UK: Stable/increasing
 
Status Summary
The WBS shows little long-term change in the abundance of Tufted Duck. However, the CBC suggests that populations away from linear waterways may be increasing slowly, a pattern supported by the species' winter trend in the UK (Pollitt et al. 2000). It is thought that the spread of the zebra mussel has helped this species in the recent past (Gibbons et al. 1993).
 
 
Table of population changes for Tufted Duck
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 16 2327 918 4838   Unrepresentative? small sample
  25 1973-1998 17 645 325 1344   Unrepresentative? small sample
  10 1988-1998 18 87 24 175   Unrepresentative? small sample
  5 1993-1998 21 2 -20 37   Unrepresentative?
WBS waterways 23 1975-1998 23 48 -21 252    
  10 1988-1998 27 34 -9 112    
  5 1993-1998 29 40 2 94    
BBS UK 5 1994-1999 117 9 -13 36    
BBS England 5 1994-1999 101 18 -6 48    
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Productivity information is not currently available for this species
 

 

   



The report should be cited as: Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Bashford, R.I., Beaven, L.P., Freeman, S.N., Marchant, J.H., Noble, D.G., Raven, M.J., Siriwardena, G.M., Thewlis, R. and Wernham, C.V. (2001) Breeding Birds in the Wider Countryside: their conservation status 2000. BTO Research Report No. 252. BTO, Thetford. (http://www.bto.org/birdtrends)

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Last updated: 19 April, 2001

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