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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Northern Ireland Seabird Report 2019
Author: Booth Jones, K.
Published: 2020
There were mixed fortunes for Northern Ireland’s seabirds in 2019, but monitoring that year also confirmed the importance of the country’s coastline for its 22 breeding seabird species.
18.03.20
Reports Northern Ireland Seabird Report

Opening a can of worms: Can the availability of soil invertebrates be indicated by birds?
Author: Martay, B. & Pearce-Higgins, J.W.
Published: 2020
Earthworms are vital for soil health, but concerns are being expressed about declines in their populations. Newly published BTO research shows how counting some of our best known birds can reveal important information about the number of earthworms beneath our feet.
05.03.20
Papers

Estimating species distributions from spatially biased citizen science data
Author: Johnston, A., Moran, N., Musgrove, A., Fink, D. & Baillie, S.R.
Published: 2020
05.03.20
Papers
Integrating scientific and local knowledge to address conservation conflicts: Towards a practical framework based on lessons learned from a Scottish case study
Author: Ainsworth, G.B., Redpath, S.M., Wilson, M., Wernham, C. & Young, J.C.
Published: 2020
04.03.20
Papers
Configurational crop heterogeneity increases within‐field plant diversity
Author: Alignier, A. Solé‐Senan, X.O., Robleño, I., Baraibar, B., Fahrig, L., Giralt, D., Gross, N., Martin, J.-L., Recasens, J., Sirami, C., Siriwardena, G., Bosem Baillod, A., Bertrand, C., Carrié, R., Hass, A., Henckel, L., Miguet, P., Badenhausser, I., Baudry, J., Bota, G., Bretagnolle, V., Brotons, L., Burel, F., Calatayud, F., Clough, Y., Georges, R., Gibon, A., Girard, J., Lindsay, K., Minano, J., Mitchell, S., Patry, N., Poulin, B., Tscharntke, T., Vialatte, A., Violle, C., Yaverscovski, N. & Batáry, P.
Published: 2020
03.03.20
Papers