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HOUSE SPARROW Passer domesticus
 
Conservation Listings Long term trend

Unlisted/Green
Biodiversity Steering Group: Unlisted

UK: Rapid decline over last 25 years
 
Status Summary
House Sparrow was not monitored well by the CBC before the mid-1970s and, being colonial and a human commensal, is not ideally suited to the CBC's methods. However, the trend shown by the CBC is very similar to that shown by the BTO's Garden Bird Feeding Survey (Glue 1994) and is supported by many anecdotal reports that have generated a great deal of conservation concern. The decline is likely to have been driven by reductions in over-winter survival (Siriwardena et al. 1999) and has been linked to a range of changes in rural and urban habitats. Possible explanations include reductions in spilt grain, increases in cat predation and the use of toxic additives in unleaded petrol.
 
 
Table of population changes for House Sparrow
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 41 -42 -80 28    
  25 1973-1998 48 -51 -76 -29 >50  
  10 1988-1998 65 -28 -47 -6 >25  
  5 1993-1998 65 -10 -21 2    
BBS UK 5 1994-1999 1187 -7 -11 -3    
BBS England 5 1994-1999 1002 -11 -15 -7    
BBS Scotland 5 1994-1999 72 9 -10 31    
BBS Wales 5 1994-1999 79 62 31 100    
BBS N.Ireland 5 1994-1999 28 -47 -68 -12 (>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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Last updated: 21 March, 2001

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