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
CORMORANT Phalacrocorax carbo
Conservation Listings Long term trend

Biodiversity Steering Group
Conservation Concern List

UK: Increasing
Shetland: Decreasing
Status Summary
The BBS indicates little change in Cormorant numbers over the past five years. The UK Seabird Monitoring Programme shows substantial increases in numbers breeding inland in England and in Northern Ireland between 1986-99 (Upton et al. 2000). However, numbers have fallen in Shetland by 5% per year over the same period.
Table of population changes for Cormorant
Source Period
Years Plots
Alert Comment
BBS UK 5 1994-1999 130 -5 -21 13    
BBS England 5 1994-1999 107 -9 -24 10    
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. (

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Last updated: 19 April, 2001

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