BTO create and publish a variety of important articles, papers, journals and other publications, independently and with our partners, for organisations, government and the private sector. Some of our publications (books, guides and atlases) are also available to buy in our online shop.
Annual report of the Seabird Monitoring Programme
Seabird Population Trends and Causes of Change: 1986–2023
This report presents the latest seabird population trends in breeding abundance and productivity using data from the Seabird Monitoring Programme (SMP).
The report documents changes in the abundance and productivity of breeding seabird species in Britain and Ireland from 1986 to 2023, and provides a detailed account of the 2021, 2022 and 2023 breeding seasons.

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Population decline is linked to migration route in the Common Cuckoo, a long-distance nocturnally-migrating bird
Author: Hewson, C.M., Thorup, K., Pearce-Higgins, J.W. & Atkinson, P.W.
Published: 2016
When the BTO began ground-breaking Cuckoo tracking project in 2011, we had very little idea where these birds spent the winter or how they got there. Our latest research not only reveals this information, but also shows that Cuckoos’ use of autumn migration routes helps explain population declines.
19.07.16
Papers

Results from the first GPS tracking of roof-nesting Herring Gulls Larus argentatus in the UK
Author: Rock, P., Camphuysen, C.J., Shamoun-Baranes, J., Ross-Smith, V.H. & Vaughan, I.P.
Published: 2016
13.07.16
Papers Ringing and Migration
The Breeding Bird Survey 2015
Author: Harris, S.J., Massimino, D., Newson, S.E., Eaton, M.A., Marchant, J.H., Balmer, D.E., Noble, D.G., Gillings, S., Procter, D. & Pearce-Higgins, J.W.
Published: 2016
This is the 21st annual report of the BTO/JNCC/RSPB Breeding Bird Survey (BBS), containing the population trends of widespread UK bird species during the period 1994-2015.
13.07.16
Reports BBS Report

Comparative biometrics of British Marsh Tits Poecile palustris and Willow Tits P. montana
Author: Broughton, R.K., Alker, P.J., Bellamy, P.E., Britton, S., Dadam, D., Day, J.C., Miles, M. & Hinsley, S.A.
Published: 2016
13.07.16
Papers
Causes and consequences of spatial variation in sex ratios in declining bird species
Author: Morrison, C.A., Robinson, R.A, Clark, J.A. & Gill, J.A.
Published: 2016
New BTO research shows a recent imbalance in Willow Warbler sex ratios, with 60% of adult birds being male. Such a skewed ratio has implications for the conservation of this migrant species.
08.07.16
Papers
