The British Trust for Ornithology
SPARROWHAWK
Accipiter nisus
Sparrowhawk © Tommy Holden
 
Conservation Listings

Unlisted/Green
Biodiversity Steering Group Conservation Concern List

Long term trend
UK: Rapid increase
 
Status Summary
Sparrowhawks increased strongly in the UK as the population recovered from the crash caused by organochlorine pesticides in the 1950s and 1960s (Newton 1986). Improving breeding performance is likely to have contributed to this increase. Failure rates at the egg stage (c.44 days from laying the first egg) have fallen from 18% to 6%. The population seems to have stabilised since the mid-1990s.
 
 
Table of population changes for Sparrowhawk
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 31 1968-1999 37 193 67 490    
  25 1974-1999 44 116 46 203    
  10 1989-1999 53 19 -1 40    
  5 1994-1999 55 -12 -25 0    
BBS UK 6 1994-2000 264 -2 -17 15    
BBS England 6 1994-2000 221 -4 -19 14    
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Sparrowhawk
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 31 1968-1999 43 None        
Brood size 31 1968-1999 83 Curvilinear 3.12 chicks 3.71 chicks 0.59 chicks  
Daily failure rate (eggs) 31 1968-1999 40 Linear decline 0.0044 nests/day 0.0014 nests/day -0.003 nests/day  
Daily failure rate (chicks) 31 1968-1999 56 None        
Laying date 31 1968-1999 17 None       Small sample
 

 

 

Insufficient data on CES
available for this species




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This report should be cited as:
Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Beaven, L.P., Downie, I.S., Freeman, S.N., Leech, D.I., Marchant, J.H.,
Noble, D.G., Raven, M.J., Simpkin, A.P., Thewlis, R.M. and Wernham, C.V.
(2002) Breeding Birds in the Wider
Countryside: their conservation status 2001. BTO Research Report No. 278. BTO, Thetford. (http://www.bto.org/birdtrends)

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This page last updated: 21 April, 2008

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