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Research Reports

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BTO Research Reports are scientific papers that have been self-published by the BTO. The following is a full list of those BTO research reports which have been published. 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 copy of a report please contact researchreports [at] bto.org.

More information about our Annual Service reports to JNCC 1992-2005.

176. Marchant, J.H., Wilson, A.M., Chamberlain, D.E., Gregory, R.D. & Baillie, S.R. Publication Date: 1997. Opportunistic bird species - enhancements for the monitoring of populations. 70pp £5.00 Download Report (PDF)
175. Balmer, D.E. & Peach, W.J. Publication Date: 1996. Review of natural avian mortality rates. ISBN: 0-903793-83-0 27pp £2.50 Download Report (PDF)
174. Burton, N.H.K., Toomer, D.K., Balmer, D.E., Rehfisch, M.M. & Clark, N.A. Publication Date: 1997. The effect of the Cardiff Bay Barrage on waterfowl populations 7. Distribution and movement studies August 1995 - May 1996. ISBN: 1-902576-86-1 136pp £10.00 Download Report (PDF)
173. Armitage, M.J.S., Burton, N.H.K., Rehfisch, M.M. & Clark, N.A. Publication Date: 1997. The abundance and distribution of waterfowl within Milford Haven after the Sea Empress oil spill. Interim Report January 1997. ISBN: 1-904870-21-X 40pp £5.00 Download Report (PDF)
172. Browne, S.J., Fuller, R.J. & Langston, R. Publication Date: 1996. An assessment of bird populations in selected forest plots: a contribution to the Biodiversity Research Programme. ISBN: 0-903793-77-6 70pp £5.00 Download Report (PDF)
171. Burton, N.H.K., Watts, P.N., Crick, H.Q.P. & Carter, N. Publication Date: 1996. The effects of pre-harvesting operations on birds nesting in Oilseed Rape Brassica napus. ISBN: 0-903793-65-2 34pp £2.50 Download Report (PDF)
169. Publication Date: 2006. What's happening to our woodland birds (Repeat Woodland Bird Survey).
166. Forrest,C. & Carter, N. Publication Date: 1996. Provision of breeding bird atlas data to the Countryside Information System. ISBN: 978-1-906204-15-0 32pp £2.50 Download Report (PDF)
165. Marchant, J.H., Forrest, C. & Greenwood, J.J.D. Publication Date: 1998. A review of large-scale generic population monitoring schemes in Europe . ISBN: 0-903793-92-X 92pp £10.00 Download Report (PDF)
164. Fuller, R.J. Publication Date: 1996. Relationships between grazing and birds with particular reference to sheep in the British uplands. ISBN: 0-903793-66-0 94pp £10.00 Download Report (PDF)
161. Toomer, D.K., Balmer, D.E., Rehfisch, M.M. & Clark, N.A. Publication Date: 1995. The effect of the Cardiff Bay Barrage on waterfowl populations 6. Distribution and movement studies August 1994 - May 1995. ISBN: 1-902576-93-4 141pp £10.00 Download Report (PDF)
160. Austin, G., Rehfisch, M.M., Holloway, S.J., Clark, N.A., Balmer, D.E., Yates, M.G., Clarke, R.T., Swetnam, R.D., Eastwood, J.A., dit Durell, S.E.A.le V., West, J.R. & Goss-Custard, J.D. Publication Date: 1996. Estuaries, sediments and shorebirds. lll. Predicting waterfowl densities on intertidal areas. 122pp £10.00
159. Crick, H.Q.P. & Baillie, S.R. Publication Date: 1996. A review of the BTO's Nest Record Scheme. Its value to the Joint Nature Conservation Committee and Country Agencies, and its methodology. ISBN: 0-903793-61-X 125pp £10.00 Download Report (PDF)
158. Browne, S.J., Austin, G.E. & Rehfisch, M.M. Publication Date: 1995. Evaluation of bird monitoring requirements for the United Kingdom's non-estuarine coastline. ISBN: 0-903793-85-7 30pp £2.50 Download Report (PDF)
156. Holloway, S.J., Rehfisch, M.M., Clark, N.A., Balmer, D.E., Austin, G., Yates, M.G., Swetnam, R.D., Eastwood, J.A., Clarke, R.T., dit Durell, S.E.A.le V., Goss-Custard, J.D. & West, J.R. Publication Date: 1995. Estuaries, sediments and shorebirds. ll. Shorebird usage of intertidal areas. 270pp £20.00
155. Marchant, J.H., Langston, R. & Gregory, R.D. Publication Date: 1995. An evaluation of the Waterways Bird Survey as a monitor of regional and national populations of waterbirds, and an appraisal of its future role.
154. Brooks, D., Bater, J., Jones, H. & Shah, P.A. Publication Date: 1995. The effect of organic farming regimes on breeding and winter bird populations - Part lV. Invertebrate and weed seed food-sources for birds in organic and conventional farming systems. ISBN: 0-903793-60-1 104pp £10.00
154. Fuller, R.J. Publication Date: 1995. The effect of organic farming regimes on breeding and winter bird populations - Part I. Summary report and conclusions.. ISBN: 0-903793-60-1 18pp £2.50
154. Evans, J., Wilson, J. & Browne, S. Publication Date: 1995. The effect of organic farming regimes on breeding and winter bird populations - Part lll. Habitat selection and breeding success of Skylarks (Alauda arvensis) on organic and conventional farmland. ISBN: 0-903793-60-1 40pp £2.50
154. British Trust for Ornithology & Institute of Arable Crops Research - Rothamsted. Publication Date: 1995. The effect of organic farming regimes on breeding and winter bird populations - Parts I-IV. ISBN: 0-903793-60-1 220pp £15.00 Download Report (PDF)
154. Chamberlain, D.E., Wilson, J.D. & Fuller, R.J. Publication Date: 1995. The effect of organic farming regimes on breeding and winter bird populations - Part ll. A comparison of breeding and winter bird populations on organic and conventional farmland. ISBN: 0-903793-60-1 64pp £5.00
153. Balmer, D.E., Henderson, I.G. & Clark, N.A. Publication Date: 1995. A study of the risk of collision with power lines by waterbirds in winter at Shotton Steel Works, North Wales. ISBN: 0-903793-73-3 32pp £2.50 Download Report (PDF)
151. Balmer, D.E. & Clark, N.A. Publication Date: 1995. Setting Forth Ornithological Assessment: Analysis of the Common Birds Census of St. Margaret's Marsh. ISBN: 0-903793-74-1 12pp £2.50 Download Report (PDF)
150. Austin, G.E. & Gregory, R.D. Publication Date: 1995. Evaluation of bird monitoring requirements in National Parks. ISBN: 0-903793-54-7 52pp £5.00 Download Report (PDF)
149. Fuller, R.J. & Wilson, J.D. Publication Date: 1995. The ecology of seed-eating birds in relation to agricultural practices: current research and future directions. ISBN: 0-903793-51-2 28pp £2.50 Download Report (PDF)
148. Marchant, J.H. & Gregory, R.D. Publication Date: 1994. Population changes of riparian birds along rivers and canals in the Severn-Trent region between 1989 and 1993.. ISBN: 0-903793-50-4 32pp £2.50 Download Report (PDF)
147. Donald, P.F. Publication Date: 1995. Changes in the distributions of breeding birds in England, Scotland and Wales: 1968-72 to 1988-91. ISBN: 0-903793-52-0 56pp £5.00 Download Report (PDF)
146. Toomer, D.K., Browne, S.J. & Clark, N.A. Publication Date: 1994. The effect of the Cardiff Bay barrage on waterfowl populations 5. Distribution and movement studies August 1993-May 1994. ISBN: 1-902576-92-6 167pp £15.00 Download Report (PDF)
145. Clark, N.A., Toomer, D.K. & Browne, S.J. Publication Date: 1995. The usage of the intertidal mudflats at the Rhymney, Cardiff, by waders and wildfowl: 2 supplementary data on upper areas December 1993 - February 1994. ISBN: 1-904870-55-4 15pp £2.50 Download Report (PDF)
144. Henderson, I.G., Langston, R.H.W. & Clark, N.A. Publication Date: 1995. A study of the risk of collision with power lines by Common Terns at Shotton Steel Works, North Wales. ISBN: 0-903793-72-5 34pp £2.50 Download Report (PDF)
143. Browne, S.J. & Clark, N.A. Publication Date: 1994. A case study of the impacts of pipeline construction on bird distribution in the Duddon Estuary. Part ll: Post construction, winter 1993/94. ISBN: 0-903793-78-4 80pp £10.00 Download Report (PDF)
141. Forrest, C. & Langston, R. Publication Date: 1994. Effects of the M6 Motorway widening on Gailey Heronry. ISBN: 0-903793-76-8 8pp £2.50 Download Report (PDF)
139. Gregory, R.D. & Baillie, S.R. Publication Date: 1994. Evaluation of sampling strategies for 1-km squares for inclusion in the Breeding Bird Survey. ISBN: 0-903793-49-0 72pp £5.00 Download Report (PDF)
137. Toomer, D.K. & Clark, N.A. Publication Date: 1994. The roosting behaviour of waders and wildfowl in Cardiff Bay: Winter 1993/94. ISBN: 1-902576-91-8 42pp £5.00 Download Report (PDF)
136. Marchant, J.H. & Gregory, R.D. Publication Date: 1995. Population changes of certain opportunistic bird species in the UK between 1985 and 1994. ISBN: 1-904870-60-0 36pp £5.00 Download Report (PDF)
134. Austin, G.E. & Crick, H.Q.P. Publication Date: 1994. Breeding phenology of Curlew. Analysis of Nest Record cards from the British Trust for Ornithology Nest Record Scheme. ISBN: 0-903793-41-5 22pp £2.50 Download Report (PDF)
131. Forrest, C. & Carter, N. Publication Date: 1993. The effects of the Woodland Initiative on bird populations and the bird strike potential at Birmingham International Airport. ISBN: 0-903793-81-4 23pp £2.50 Download Report (PDF)
129. Wilson, J.D. & Browne, S.J. Publication Date: 1993. Habitat selection and breeding success of Skylarks (Alauda arvensis) on organic and conventional farmland. ISBN: 0-903793-36-9 48pp £5.00 Download Report (PDF)
128. Shepherd, M. & Clark, N.A. Publication Date: 1993. The effect of commercial cockling on the numbers of wintering waterfowl on the Solway Estuary. ISBN: 0-903793-53-9 37pp £5.00 Download Report (PDF)
126. Toomer, D.K., Browne, S.J. & Clark, N.A. Publication Date: 1993. The effect of the Cardiff Bay barrage on waterfowl populations 4. Distribution and movement studies August 1992-May 1993. ISBN: 1-902576-90-X 186pp £15.00 Download Report (PDF)
124. Donald, P.F. & Forrest, C. Publication Date: 1993. The effects of agricultural change on population size and territory distribution of the Corn Bunting Miliaria calandra. 52pp £5.00 Download Report (PDF)
122. Evans, J. Publication Date: 1993. Temporal and spatial variation in low tide counts of wildfowl and waders on selected estuaries in Great Britain. ISBN: 0-903793-84-9 48pp £5.00 Download Report (PDF)
121. Holloway, S.J. Publication Date: 1993. The effects of the 1993 Wye Raft Race on the distribution of waterfowl broods. ISBN: 0-903793-86-5 38pp £5.00 Download Report (PDF)
120. Rehfisch, M.M., Langston, R.H.W., Clark, N.A. & Forrest, C. Publication Date: 1993. A guide to the provision of refuges for roosting waders. ISBN: 0-903793-46-6 126pp £10.00 Download Report (PDF)
119. Callion, J. Publication Date: 1993. Ornithological survey of application site for proposed rock characterisation facility. ISBN: 0-903793-75-X 13pp £2.50 Download Report (PDF)
117. Baillie, S.R. Publication Date: 1993. The implications of studies of the reporting rates of ringed birds for the interpretation of results from the Wildlife Incidents Investigation Scheme. ISBN: 0-903793-35-0 107pp £10.00 Download Report (PDF)
116. Toomer, D.K. & Clark, N.A. Publication Date: 1993. The roosting behaviour of waders and wildfowl in Cardiff Bay: Winter 1992/93. ISBN: 1-902576-97-7 46pp £5.00 Download Report (PDF)
115. Henderson, I.G., Peach, W.J. & Baillie, S.R. Publication Date: 1993. The hunting of Snipe and Woodcock in Europe: a ringing recovery analysis. ISBN: 0-903793-34-2 57pp £5.00 Download Report (PDF)
112. Forrest, C. & Langston, R. Publication Date: 1993. Inventory of ornithological data for Thames Waters Sewage Treatment Works (2 volumes). ISBN: 0-903793-80-6 54pp £5.00 Download Report (PDF)
112. Forrest, C. & Langston, R. Publication Date: 1993. Inventory of ornithological data for Thames Water Sewage Treatment Works (2 volumes). ISBN: 0-903793-80-6 20pp £2.50 Download Report (PDF)

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