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MALLARD Anas platyrhynchos
 
Conservation Listings Long term trend

Unlisted/Green
Biodiversity Steering Group
Conservation Concern List

UK: Rapid increase
 
Status Summary
Mallards have increased steadily in the UK since the 1960s, an increase that may have been contributed to by large-scale releases for shooting (Marchant et al. 1990). Winter populations have declined since the late 1980s (Pollitt et al. 2000), perhaps because these releases have been reduced in scale.
 
 
Table of population changes for Mallard
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 112 101 68 150    
  25 1973-1998 117 55 34 85    
  10 1988-1998 110 13 0 27    
  5 1993-1998 118 5 -3 15    
CBC farmland 30 1968-1998 63 75 . .    
  25 1973-1998 64 34 . .    
  10 1988-1998 65 10 . .    
  5 1993-1998 68 3 . .    
WBS waterways 23 1975-1998 93 190 116 286    
  10 1988-1998 107 69 39 103    
  5 1993-1998 115 22 11 33    
BBS UK 5 1994-1999 874 21 13 30    
BBS England 5 1994-1999 728 16 8 25    
BBS Scotland 5 1994-1999 85 73 36 120    
BBS Wales 5 1994-1999 45 -49 -64 -28 (>25) Small sample
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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