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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Weak migratory connectivity, loop migration and multiple non‐breeding site use in British breeding Whinchats Saxicola rubetra
Author: Burgess, M.D., Finch, T., Border, J.A., Castello, J., Conway, G., Ketcher, M., Lawrence, M., Orsman, C.J., Mateos, J., Proud, A., Westerberg, S., Wiffen, T. & Henderson, I.G.
Published: 2020
26.02.20
Papers
Optimising nature conservation outcomes for a given region‐wide level of food production
Author: Finch, T., Green, R.E., Massimino, D., Peach, W.J. & Balmford, A.
Published: 2020
22.02.20
Papers
Red Sixty Seven
Author: Curated by Kit Jewitt
Published: 2020
This book should not exist!In an ideal world this book, and the official Red List of the most vulnerable birds in the UK it is based on, would not be needed. But the world is far from ideal and our bird populations are declining at an alarming rate. In the past few years alone the once widespread Wryneck has ceased breeding in the UK altogether and has dropped off the list completely. Which species will be next?
14.02.20
Books and guides

APEP 4 - Population estimates of birds in Great Britain and the United Kingdom
Author: Woodward, I., Aebischer, N., Burnell, D., Eaton, M., Frost, T., Hall, C., Stroud, S. & Noble, D.
Published: 2020
A summary of the fourth report by the Avian Population Estimates Panel, presenting population estimates of birds in Great Britain and the United Kingdom.Estimates of population size are a key tool, used alongside population trend information and that on other aspects of bird ecology (such as survival and productivity rates) to assess conservation status. Periodic assessments of the size of breeding and wintering bird populations in the UK and in Great Britain are made by the Avian Population Estimates Panel (APEP). Their fourth assessment ‘APEP 4’ is published in the journal British Birds, and summarised here.
01.02.20
Papers

Public preferences for multiple dimensions of bird biodiversity at the coast: insights for the cultural ecosystem services framework
Author: Boeri, M., Stojanovic, T.A., Wright, L.J., Burton, N.H.K., Hockley, N. & Bradbury, R.B.
Published: 2020
07.01.20
Papers