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Research Reports

bto research report 692 cover

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]

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

493. Calladine, J., Garner, G. & Humphreys, L. Publication Date: 2013. A sample survey of the breeding birds at woodland expansion sites of the Scottish Forest Alliance in 2007. ISBN: 978-1-908581-19-8 48pp £5.00 Download Report (PDF)
490. Hewson, C.M., Fuller, R.J., Amor, A. & Smith, K. Publication Date: 2012. Changes in the structure of British woodland bird communities between the 1980s and 2003-2004; analysis of Repeat Woodland Bird Survey data. ISBN: 978-1-908581-15-0 102pp £10.00 Download Report (PDF)
489. Banks, A.N., Wright, L.J., Maclean, I.M.D., Hann, C. & Rehfisch, M.M. Publication Date: 2009. Review of the status of introduced non-native waterbird species in the area of African-Eurasian Waterbird Agreement: 2007 update. ISBN: 978-1-906204-65-5 146pp £15.00 Download Report (PDF)
487. Baillie, S.R., Marchant, J.H., Crick, H.Q.P., Noble, D.G., Balmer, D.E., Barimore, C., Coombes, R.H., Downie, I.S., Freeman, S.N., Joys, A.C., Leech, D.I., Raven, M.J., Robinson, R.A. & Thewlis, R.M. Publication Date: 2007. Breeding Birds in the Wider Countryside: their conservation status 2007.
486. Maclean, I.M.D., Rehfisch, M.M., Robinson, R.A. & Delany, S. Publication Date: 2007. The effects of climate change on migratory waterbirds within the African-Eurasian flyway. ISBN: 978-1-906204-51-8 99pp £15.00 Download Report (PDF)
485. Vickery, J., Chamberlain, D., Evans, A., Ewing, S., Boatman, N., Pietravalle, S., Norris, K. & Butler, S. Publication Date: 2007. Predicting the impact of future agricultural change and uptake of Entry Level Stewardship on farmland birds. ISBN: 978-1-906204-29-7 189pp £15.00 Download Report (PDF)
484. Maclean, I.M.D., Skov, H. & Rehfisch, M.M. Publication Date: 2007. Further use of aerial surveys to detect bird displacement by offshore wind farms. ISBN: 978-0-9557501-1-3 Download Report (PDF)
483. Burton, N.H.K., Maclean, I..M.D. & Austin, G.E. Publication Date: 2007. An assessment of the feasibility of annual monitoring of winter gull roosts in the UK and possible outputs from such a scheme. ISBN: 978-1-906204-54-9 54pp £5.00 Download Report (PDF)
480. Maclean, I.M.D., Frederiksen, M. & Rehfisch, M.M. Publication Date: 2007. Potential use of population viability analysis to assess the impact of offshore windfarms on bird population. Download Report (PDF)
479. Austin, G.E., Banks, A.N. & Rehfisch, M.M. Publication Date: 2007. New developments towards a more comprehensive assessment of trends in the wintering waterbird assemblage. ISBN: 978-1-906204-57-0 30pp £5.00 Download Report (PDF)
478. Carter, N. Publication Date: 2007. Westfield Farm, Cambs (Plot 1572) The Countryside Restoration Trust Report on Breeding Birds 2005. ISBN: 978-1-906204-21-1 12pp £2.50 Download Report (PDF)
477. Banks, A.N., Bolt, D., Bullock, I.D., Collier, M.P., Fairney, N.P., Hasler, C., Haycock, B., Maclean, I.M.D., Roberts, N.P., Sanderson, W.G., Schofield, R.A., Smith, L., Swan, J.M., Taylor, R.H.A. & Whitehead, S. Publication Date: 2007. Ground and aerial monitoring for Carmarthen Bay SPA 2004-2007. Download Report (PDF)
473. Calladine, J. & Wernham, C. Publication Date: 2007. Extensive monitoring of Arctic alpine birds in Scotland: a pilot survey to test the potential of using volunteer surveys. ISBN: 978-1-906204-24-2 62pp £5.00 Download Report (PDF)
472. Calladine, J., Garner, G. & Wernham, C. Publication Date: 2012. Developing methods for the field survey and monitoring of breeding Short-eared Owls (Asio flammeus) in the UK: an interim report from pilot fieldwork in 2006. ISBN: 978-1-908581-17-4 62pp £5.00 Download Report (PDF)
469. Robinson, R.A., Burton, N.H.K., Clark, J.A. & Rehfisch, M.M. Publication Date: 2007. Monitoring survival of waders in Britain. ISBN: 1-904870-73-2 77pp £10.00 Download Report (PDF)
468. Newson, S.E., Crick, H.Q.P., Clark, J.A. & Moss, D. Publication Date: 2007. Timing of breeding of moorland birds in Wales. ISBN: 1-904870-97-X 55pp £5.00 Download Report (PDF)
467. Banks, A.N., Maclean, I.M.D., Collier, M.P., Hainsworth, I., Howells, R.J. & Hughes, D.S. Publication Date: 2007. Monitoring bird distribution and behaviour on the Carmarthen Bay & Estuaries SAC at low tide. ISBN: 978-1-906204-28-0 83pp £10.00 Download Report (PDF)
466. Grantham, M.J. & Newson, S.E. Publication Date: 2007. Post-mortem analysis of bird corpses from the grounding of MSC Napoli. ISBN: 978-1-906204-08-2 21pp £2.50 Download Report (PDF)
465. Burton, N.H.K. & Maclean, I.M.D. Publication Date: 2007. The effects on waterbirds of dredging at the Cardiff Bay Barrage: report for 2006/07. ISBN: 1-904870-98-8 28pp £2.50 Download Report (PDF)
464. Henderson, I., Chamberlain, D., Davis, S. & Noble, D. Publication Date: 2007. Changes in breeding bird populations due to housing development based on bird density and assemblages along urban-rural gradients. ISBN: 978-1-906204-18-1 62pp £5.00 Download Report (PDF)
463. Atkinson, P., Choquet, R., Frederiksen, M., Gillings, S., Pradel, R. & Rehfisch, M.M. Publication Date: 2007. Towards developing thresholds for waterbirds that take into account turnover. ISBN: 978-1-906204-22-8 30pp £2.50 Download Report (PDF)
459. Calladine, J., Humphreys, L. & McPhie, F. Publication Date: 2007. The effects of thinning in commercial conifer plantations on breeding bird abundance and diversity in the north of Scotland. ISBN: 1-904870-95-3 35pp £2.50 Download Report (PDF)
457. Henderson, I., Clark, N. & Holloway, S. Publication Date: 2006. Changes in farmland bird abundance at Colworth 2000-2006 Final Report. ISBN: 1-904870-91-0 33pp £2.50 Download Report (PDF)
456. Banks, A.N., Burton, N.H.K., Calladine, J.R. & Austin, G.E. Publication Date: 2006. Winter gulls in the UK: population estimates from the 2003/04-2005/06 Winter Gull Roost Survey. ISBN: 978-1-904870-93-7 58pp £5.00 Download Report (PDF)
454. Leech, D.I., Barimore, C.J., Crick, H.Q.P. & Shawyer, C.R. Publication Date: 2006. The BTO Barn Owl Monitoring Programme: sixth year 2005. ISBN: 1-904870-89-9 50pp £5.00 Download Report (PDF)
453. Robinson, R.A. & Clark, J.A. Publication Date: 2006. Declines of Afro-Palaearctic migrants: reviewing current information and developing hypotheses. ISBN: 1-904870-92-9 50pp £5.00 Download Report (PDF)
451. Austin, G.E., Burton, N.H.K. & Rehfisch, M.M. Publication Date: 2006. Newport Wetlands Reserve: assessment of the SPA potential of a newly established wetland 2000/01 to 2005/06. ISBN: 978-1-906204-00-6 32pp £5.00 Download Report (PDF)
448. Crick, H.Q.P., Atkinson, P.W., Newson, S.E., Robinson, R.A., Snow, L., Balmer, D.E., Chamberlain, D.E., Clark, J.A., Clark, N.A., Cranswick, P.A., Cromie, R., Hughes, B., Grantham, M.J., Lee, R., & Musgrove, A.J. Publication Date: 2006. Avian influenza incursion analysis (through wild birds). ISBN: 1-904870-87-2 165pp £40.00 Download Report (PDF)
446. Maclean, I.M.D., Skov, H., Freeman, S.N., Rehfisch, M.M. & Werner, P. Publication Date: 2006. Use of aerial surveys to detect bird displacement by offshore wind farms. Download Report (PDF)
445. Burton, N.H.K., Holloway, S.J., Thewlis, R.M., Carter, N. & Rehfisch, M.M. Publication Date: 2006. The potential effects on birds of onshore development for the proposed Greater Gabbard Offshore Wind Farm: report for 2006. ISBN: 978-1-906204-02-0 21pp £2.50 Download Report (PDF)
444. Carter, N. Publication Date: 2006. Lark Rise Farm, Barton, Cambs (Plot 1571). The Countryside Restoration Trust report on breeding birds 2004. ISBN: 1-904870-79-1 17pp £2.50 Download Report (PDF)
443. Banks, A.N. Publication Date: 2006. Surveying waterbirds in Morecambe Bay for the Wetland Bird Survey (WeBS), Low Tide Count Scheme. ISBN: 1-904870-76-7 172pp £15.00 Download Report (PDF)
442. Burton, N.H.K. & Goddard, A. Publication Date: 2006. Impacts of changes in sewage disposal on waterbirds wintering on the Northumbrian coast - Final report. ISBN: 978-1-906204-66-2 24pp £10.00 Download Report (PDF)
441. Austin, G.E., Banks, A.N. & Rehfisch, M.M. Publication Date: 2006. Developing a Scottish Wintering Waterbird Indicator. Download Report
440. Banks, A.N., Maclean, I.M.D., Burton, N.H.K., Austin, G.E., Carter, N., Chamberlain, D.E., Holt, C., Rehfisch, M.M., Pinder, S., Batty, A., Wakefield, E. & Gill, P. Publication Date: 2006. The potential effects on birds of the Greater Gabbard Offshore Windfarm: report for February 2004 to April 2006. ISBN: 978-1-906204-05-1 267pp £20.00 Download Report (PDF)
438. Austin, G.E., Holloway, S. & Rehfisch, M.M. Publication Date: 2006. 2007 Non-estuarine coastal waterbird survey preparations and stratification. ISBN: 1-904870-99-6 15pp £2.50 Download Report (PDF)
437. Chamberlain, D., Noble, D. & Vickery, J. Publication Date: 2006. Assessment of the impacts of the Entry Level Scheme on bird populations: results from the baseline year, 2005. ISBN: 978-1-906204-11-2 24pp £2.50 Download Report (PDF)
436. Grieve, A., Holloway, S.J., Rehfisch, M.M. & Fletcher, D.J. Publication Date: 2006. Qurm Environmental Information Centre (QEIC) Development Project: creation of natural lagoons and visitor facilities. ISBN: 1-904870-74-0 51pp £5.00 Download Report (PDF)
434. Burton, N.H.K. & Holloway, S.J. Publication Date: 2006. The effects on waterbirds of dredging at the Cardiff Bay Barrage. Report for 2005/06. ISBN: 1-904870-88-0 28pp £2.50 Download Report (PDF)
433. Newson, S.E., Ekins, G.R., Marchant, J.H., Rehfisch, M.M. & Sellers, R.M. Publication Date: 2006. The status of inland and coastal breeding Great Cormorants Phalacrocorax carbo in England. ISBN: 1-904870-72-4 36pp £5.00 Download Report (PDF)
432. Maclean, I.M.D., Burton, N.H.K. & Austin, G.E. Publication Date: 2006. Declines in over-wintering diving ducks at Lough Neagh and Lough Beg: comparisons of within site, regional, national and European trends. ISBN: 978-1-906204-06-8 69pp £5.00 Download Report (PDF)
431. Collier, M.P., Burton, N.H.K. & Baylis, S. Publication Date: 2006. A survey and assessment of the birds of the Cam Washes and Berry Fen SSSIs Cambridgeshire, focussing on breeding and wintering waterbirds. ISBN: 1-904870-81-3 37pp £5.00 Download Report (PDF)
430. Carter, N. Publication Date: 2006. Westfield Farm, Cambridgeshire (Plot 1572). The Countryside Restoration Trust report on breeding birds 2004. ISBN: 1-904870-80-5 15pp £2.50 Download Report (PDF)
429. Conway, G.J., Crick, H.Q.P., Fuller, R.J., Handschuh, M., Maclean, I.M.D., Marchant, J.H., Musgrove, A.J., Newson, S.E., Noble, D.G., Rehfisch, M.M. & Thewlis, R.M. Publication Date: 2006. Coverage of designated sites in England by BTO bird monitoring schemes: a review to 2005. ISBN: 978-1-906204-16-7 156pp £15.00 Download Report (PDF)
428. Newson, S.E. & Noble, D.G. Publication Date: 2006. The production of population trends for UK mammals using BBS Mammal Data: 1995-2004 update. ISBN: 1-904870-54-6 67pp £5.00 Download Report (PDF)
426. Atkinson, P.W., Baker, A.J., Bevan, R.M., Clark, N.A., Cole, K.B.,Gonzalez, P.M., Newton, J., & Robinson, R.A. Publication Date: 2005. Unravelling the migration and moult strategies of a long-distance migrant using stable isotopes: Red Knot Calidris canutus movements in the Americas.
424. Leech, D.I., Crick, H.Q.P. & Shawyer, C.R. Publication Date: 2005. The BTO Barn Owl Monitoring Programme: fifth year 2004. ISBN: 1-904870-52-X 64pp £5.00 Download Report (PDF)
423. Calladine, J. Publication Date: 2005. A pilot study to test the efficacy of field methods for wide scale monitoring of Ptarmigan in Scotland. ISBN: 1-904870-51-1 28pp £2.50 Download Report (PDF)