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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Impacts of changes in sewage disposal on populations of waterbirds wintering on the Northumbrian coast. Report for 2003/04
Author: Burton, N.H.K., Goddard, A.P. & Grant, A.
Published: 2004
This report reviews the results of and extends the investigation, commissioned by Northumbrian Water Ltd and begun in 1996/97 by the University of Durham, of the impacts of the improvements to sewage discharges on waterbirds wintering on a 36 km stretch of the Northumbrian coast between the Coquet Estuary and St. Mary’s Island.
01.12.04
Research reports Research reports
