BTO Research Reports are scientific papers that have been self-published by the BTO. The following is a full list of the published BTO research reports. Most are free to download, and links to Abstracts are included where possible.
Numbers missing from the list are those allocated but which were never produced or which have not been published. BTO recognises that, particularly in respect of commercially sensitive cases, a period of confidentiality is appropriate for some projects. However, in the interests of scientific development and dissemination of information, we encourage clients to permit publication as soon as it is reasonable to do so.
- If you wish to purchase a physical copy of a report please contact researchreports@bto.org.
- More information about our Annual Service reports to JNCC 1992-2005.
Assessment of recent Hen Harrier population trends in England through population modelling
This study uses a population modelling approach to explore the effects of changes in rates of productivity, survival, and settlement on population growth in the English population of Hen Harriers.
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The Breeding Bird Survey of the United Kingdom
Author: Massimino, D., Baillie, S.R., Balmer, D.E., Bashford, R.I., Gregory, R.D., Harris, S.J., Heywood, J.J.N., Kelly, L.A., Noble, D.G., Pearce-Higgins, J.W., Raven, M.J., Risely, K., Woodcock, P., Wotton, S.R. & Gillings, S.
Published: 2024
Good quality information on species’ population trends is essential for successful conservation action. In this paper, the dataset of the BTO/JNCC/RSPB Breeding Bird Survey (BBS) is made publicly available, along with details of how the data can be used to calculate bird population trends. This will help to further inform bird conservation in the UK and beyond.BBS data have been widely used in research over the past three decades, and they have always been available upon request. However, with this publication, over seven million records are made freely and openly available. In this, the BBS becomes one of few structured national recording schemes for birds anywhere in the world which makes the information collected by its volunteers wholly available to anyone who wishes to access it.
29.12.24
Papers
Impacts of highly pathogenic avian influenza on seabird populations in the North Sea are detectable in sea-watchers’ migration counts
Author: Macgregor, C.J., Gillings, S., Balmer, D.E., Boersch-Supan, P.H., Harris, S.J., Hereward, H.F.R., Humphreys, E.M., Pearce-Higgins, J.W., Taylor, R.C., Troost, G. & Atkinson, P.W.
Published: 2024
BTO research reveals that seabird population declines due to Highly Pathogenic Avian Influenza (HPAI) can be detected using data collected by volunteer seawatchers.
28.12.24
Papers
Status and distribution of Rook Corvus frugilegus in Wales in 2022/23
Author: Hereward, H.F.R., Brenchley, A., Facey, R.J., Hughes, J., Lindley, P.J., Taylor, R.C., Wilson, M.W. & Macgregor, C.J.
Published: 2024
In 2022 and 2023, the Welsh Ornithological Society (WOS) coordinated a countrywide colony survey of Rooks in Wales, to estimate population and distribution size and change.
25.12.24
Papers
Seabird Population Trends and Causes of Change: 1986–2023
Author: Harris, S.J., Baker, H., Balmer, D.E., Bolton, M., Burton, N.H.K., Caulfield, E., Clarke, J.A.E., Dunn, T.E., Evans, T.J., Hereward, H.R.F., Humphreys, E.M., Money, S. and O’Hanlon, N.J.
Published: 2024
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.This report includes both inland and coastal populations and trends from the Channel Islands, England, Isle of Man, Northern Ireland, Scotland, Wales and the Republic of Ireland, which are presented where sufficient data are available. The results from this report are used more broadly to assess the health of the wider environment, to inform policy and for conservation action.
21.11.24
Reports Research reports
