Reports

Reports

BTO publishes various reports, from those covering the annual results of core surveys, through scientific studies, and on to those produced in partnership with other organisations. Many of these are published as BTO Research Reports, which includes BBS reports, Waterbirds in the UK (WeBS) reports and SMP reports. You can access all of our reports from here, though note that we are currently updating the reports section, working backwards through time to bring all of the report pages into a consistent format. You can read our Annual Report and Accounts in the Governance section.

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Northern Ireland Seabird Report 2024

Author: El Haddad, H. & Upton, A.J.

Published: 2025

This report includes detailed information about the population trends and breeding success of seabirds in Northern Ireland, over the 2024 breeding season. Monitoring reports for Strangford Lough and the Outer Ards are included, as well as several additional contributor articles.

27.03.25

Reports Northern Ireland Seabird Report

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Bat distribution and activity in the Skell Valley catchment, 2024 Report

Author: Newson, S.E. & Crisp, G.

Published: 2025

This report presents the main findings from survey work delivered using passive acoustic monitoring devices deployed across the Skell Valley catchment. Through the surveys that we support we aim to improve knowledge and understanding of species distribution and activity, covering a range of taxonomic groups, including birds, bats, small terrestrial mammals and insects. Through the approach we provide robust datasets that can be used to inform better decision-making processes.

07.03.25

BTO Research Reports

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Ryevitalise – Bats and Ancient Trees, 2020–2024 Report

Author: Newson, S.E. & Panter, T.L.

Published: 2025

Working with a network of volunteers, static acoustic bat detectors were deployed over five survey seasons, 2020-2024, to provide bat data for the Ryevitalise Landscape Partnership Scheme area of the North York Moors National Park. This report provides an overview of the survey coverage and results from the project.

04.03.25

BTO Research Reports

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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 SMP Report

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Watching Out for Waders: The Working for Waders Nest Camera Project

Author: Noyes, P., Laurie, P., Wetherhill, A. & Wilson, M.

Published: 2024

This report presents the results of a trial involving the use of trail cameras by land managers and other wader conservation stakeholders to monitor the outcome of wader nesting attempts. It presents the results of the trial and assesses the potential for the project to improve wader conservation knowledge and management.

04.10.24

BTO Research Reports

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