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

Biodiversity Steering Group: Unlisted

UK: Unknown
Status Summary
Swifts were not monitored before in the inception of the BBS and the latter scheme shows large fluctuations in abundance since 1994. A long BBS time-series may therefore have to be accrued before definitive statements can be made about population trends. Concern for Swifts, a small organisation of private individuals, is trying to promote provision of nesting sites for this species as so many are being lost to development. It is also gathering information on populations to assess whether the species should be listed in the next Birds of Conservation Concern. (For more information on Concern for Swift contact Chris Mead)
Table of population changes for Swift
Source Period
Years Plots
Alert Comment
BBS UK 5 1994-1999 824 6 -3 15    
BBS England 5 1994-1999 722 6 -2 16    
BBS Scotland 5 1994-1999 40 -28 -50 3   Small sample
BBS Wales 5 1994-1999 49 53 6 121   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. (

[ Welcome | Contents | Introduction | CBC | WBS | BBS | Heronries | CES | NRS | Alerts ]
[ Summary | Discussion | References | Help | BTO Home Page ]

© 2000 British Trust for Ornithology
BTO, The Nunnery, Thetford, Norfolk IP24 2PU
Tel: (+44) (0) 1842 750050 Fax: (+44) (0) 1842 750030 Email:

Last updated: 28 March, 2001

Page created by Susan Waghorn