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. 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
Assessment of recent Hen Harrier population trends in England through population modelling
Author: Macgregor, C.J., Pearce-Higgins, J.W., Siriwardena, G.M., Wilson, M.W. & Robinson, R.A.
Published: 2025
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.
14.03.25
Research reports Research reports
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
Research reports Research reports
Farming in Project Landscapes – Turtle Dove Monitoring Project, 2024 Report
Author: Ashton-Butt, A., Gillings, S., Thurston, L., Wells, F., Wetherhill, A. & Newson, S.E.
Published: 2025
This report presents the results of work using static acoustic recorders, deployed between May and mid-August 2024, to provide extensive acoustic data for the Stour Valley Farmer Cluster.
04.03.25
Research reports Research reports
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
Research reports Research reports
