The British Trust for Ornithology
BUZZARD
Buteo buteo
Buzzard © Derek Belsey
 
Conservation Listings

Unlisted/Green
Biodiversity Steering Group Conservation Concern List

Long term trend
UK: Increase
 
Status Summary
The CBC shows a significant recent increase in Buzzard abundance but does not cover the species' northern and western strongholds well. This pattern is supported, however, by increases in the BBS for all of the UK, particularly in England. The increase reflects population expansion to the south and east and has been associated with improving nesting success, perhaps through reduced persecution (Elliott & Avery 1991), the recovery of Rabbit populations from the effects of myxomatosis and release from the deleterious effects of organochlorine pesticides. The decline in failure rate at the egg stage (c.42 days from laying the first egg) is from 23% to 8%.
 
 
Table of population changes for Buzzard
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 31 1968-1999 22 404 236 1040   Unrepresentative?
  25 1974-1999 25 318 199 646   Unrepresentative?
  10 1989-1999 33 197 129 358   Unrepresentative?
  5 1994-1999 41 77 57 115   Unrepresentative?
BBS UK 6 1994-2000 448 41 27 57    
BBS England 6 1994-2000 244 46 28 68    
BBS Scotland 6 1994-2000 93 51 15 98    
BBS Wales 6 1994-2000 103 3 -17 28    
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Buzzard
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 31 1968-1999 31 None        
Brood size 31 1968-1999 86 None        
Daily failure rate (eggs) 31 1968-1999 24 Linear decline 0.0062 nests/day 0.0021 nests/day -0.0041 nests/day Small sample
Daily failure rate (chicks) 31 1968-1999 42 None        
 

 

Insufficient data on laying dates
available for this species

 


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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