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 proportion of common pheasants shot using lead shotgun ammunition in Britain has barely changed over five years of voluntary efforts to switch from lead to non-lead ammunition
Author: Green, R.E., Taggart, M.A., Pain, D.J., Clark, N.A., Cromie, R., Dodd, S.G., Elliot, B., Green, R.M.W., Greenwood, L., Huntley, B., Leslie, R., Porter, R., Price, M., Roberts, J., Robinson, R.A., Smith, K.W., Smith, L., Spencer, J., David Stroud, D. & Thompson, T.
Published: 2025
A full voluntary transition from lead to non-lead shotgun ammunition by 2025 only resulted in a slight, non-significant downward trend in the proportion of Pheasants killed using lead shot over the five-year transition period.
06.03.25
Papers
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
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
Reports Research reports
The Białowieża Forest as an example of the resilience of long-term studies in a changing world
Author: Broughton, R.K., Cholewa, M., Czeszczewik, D., Fuller, R.J., Jaroszewicz, B., Kuijper, D.P.J., Maziarz, M., Mikusiński, G. & Neubauer, G.
Published: 2025
Long-term studies offer valuable ecological insights but are vulnerable to change. Environmental, social and geopolitical changes bring risks and opportunities. Poland's Białowieża Forest has seen decades of changes and provides lessons of research resilience. Collaborative teams and leadership dispersed between institutes disperses the risk, and adaptability in exploiting opportunities aids the continuity of long-term studies.
01.03.25
Papers
Current understanding of how climate change affects seabirds varies between regions and species in the North-East Atlantic
Author: Johnston, D.T., Humphreys, E.M., Davies, J.G., Evans, T., Howells, R.J. & Pearce-Higgins, J.W.
Published: 2025
BTO-led research identifies key gaps in our knowledge and understanding of how climate change is affecting seabirds.
27.02.25
Papers
