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This page lists the British Trust for Ornithology research reports 499 to 400.

BTO pages on the site

Breeding Bird Survey

Conservation advice notes

Research notes

Research Reports
- 692 to 600
- 599 to 500
- 499 to 400
- 399 to 300
- 299 to 200
- 199 to 100
- 99 to 1

BTO web site

No report identified

British Trust for Ornithology

Development Of Wild Bird Indicators For Freshwater Wetlands And Waterways: Provisional Indicators

D. Noble, M. Everard, & A. Joys

British Trust for Ornithology

2008

From the introduction: "Much of the earlier history of bioindicator development in the UK was to reflect single pressures, such as organic pollution or acidification of wetland habitats. However, more recent legislation (particularly the EU Water Framework Directive (WFD)), broader-scale commitments (such as the Environment Agency’s Vision theme of An Enhanced Environment for Wildlife), agreements for delivery of public benefit in the UK such as the Defra (Department of Environment, Food and Rural Affairs) PSA (Public Sector Agreement) of '... biodiversity safeguarded and enhanced', and evolving awareness of the interactions of environmental impacts means that we require more sophisticated and comprehensive indicators that demonstrate the integrated impacts of multiple pressures."

Humber Estuary SPA Waterbird Populations: Trend Analyses By Count Sector

Austin, G.E., Calbrade, N.A., Rehfisch, M.R & Wright, L.J

British Trust for Ornithology

2008

Objectives: "Thus the objectives of this report are to gain an estuary-wide understanding of fluctuations in numbers of certain waterbird species to inform the consenting of operations and appropriate assessments of plans and projects on the Humber Estuary by: identifying the abundance trends over the last 15 years in each of the WeBS count sectors of the Humber Estuary for 23 waterbird species and comparing these trends to the estuary as a whole; identifying those WeBS sectors in which substantial numbers of species are declining contrary to, or more rapidly than on the estuary as a whole; identifying those sectors that support a substantial proportion of species that are declining on the estuary as a whole.

Developing methods for the field survey and monitoring of breeding Short-eared owls (Asio flammeus) in the UK: Final report from pilot fieldwork in 2006 and 2007

John Calladine, Graeme Garner and Chris Wernham

British Trust for Ornithology

2008

"This report details the results of a two-year study during the 2006 and 2007 breeding seasons. The aims of the study were: (i) To identify the most appropriate times of day and stages of breeding for surveying and to translate the findings into feasible survey protocols; (ii) To carry out observations to assist in the differentiation of separate breeding territories and to translate these findings into feasible survey and analytical protocols; (iii) To evaluate the feasibility of, and encounter rates resulting from, more extensive field surveys and how these relate to numbers of breeding short-eared owls estimated from intensive observations in key study areas; and (iv) To make recommendations both for field protocols for use in producing a population estimate of short-eared owls in any given area in any given year, and for extensive methods for producing indices of abundance to monitor population changes and allow the results of a full survey in any given year to be placed in context."

Indicators of the impact of climate change on migratory species

Newson, S.E., Dulvy, N., Hays, G.C., Houghton, J.D.R., Gerard, F.F., Hutson, A.M., Macleod, C.D., Mendes, S., Robinson, R., Sparks, T.H., Pierce, G.J & Crick, H.Q.P

British Trust for Ornithology

2008

Opening lines: "Migratory species, by travelling large distances, often between discrete sites, are particularly likely to be affected by anthropogenically-induced climate change at some point in their life cycles. The UK Government is a signatory to a number of international treaties and agreements that seek to promote and maintain the conservation status of migratory species of wildlife, and the Department for Environment, Food and Rural Affairs (Defra) takes a lead role for the Government in th ese areas. The primary instrument in this area is the Bonn Convention on the Conservation of Migratory Species of Wild Animals (CMS). Recently, the CMS adopted a Resolution (UNEP/CMS/8.13) recognising the impacts of climate change on migratory species and calling on parties and range states to undertake more research to improve our understanding of these impacts and to implement adaptation measures to help reduce foreseeable adverse effects addressing this."

Winter Farmland Bird Survey

S Gillings, A M Wilson, G J Conway, J A Vickery & R J Fuller, P Beavan, S E Newson, D G Noble & M P Toms

British Trust for Ornithology

2008

Opening lines: "This report presents the results from a large-scale survey of wintering birds on a representative sample of lowland farmland in Britain – the Winter Farmland Bird Survey. The aims of the Winter Farmland Bird Survey were three-fold: first, to provide information on the distribution and abundance of a suite of farmland bird species across the whole of lowland Britain; second to describe the distribution and abundance of agricultural habitats in winter; and, third to identify the habitat preferences of farmland birds in winter across a wide geographic area and to investigate the importance of regional and seasonal differences."

A Sample Survey Of The Breeding Birds At Woodland Expansion Sites Of The Scottish Forest Alliance In 2007

Calladine, J., Garner, G & Humphreys, L

British Trust for Ornithology

2008

From the introduction: "This report presents the results of a sample survey of breeding birds at 11 SFA sites in Scotland in 2007. This is the first of a series of planned periodic surveys that will quantify changes in avifauna as woodland at the sites develops over the next 100 years. Together with concurrent monitoring of vegetation and other taxa (hoverflies and shelled gastropods) plus other assessments of the activity of selected animal groups, the progressive development of woodland ecosystems will be monitored. Co-ordinated by Forest Research on behalf of the SFA, this information will be used to measure the achievements of the SFA in meeting its targets for biodiversity and to influence and inform woodland management practices and associated grant support systems."

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

Changes In The Structure Of British Woodland Bird Communities Between The 1980s And 2003-2004; Analysis Of Repeat Woodland Bird Survey Data

C.M. Hewson, R.J. Fuller, A. Amor, & K. Smith

British Trust for Ornithology

2008

Opening lines of executive summary: "Data on the population changes of birds in British woodland were collected in the Repeat Woodland Bird Survey (RWBS) to confirm the extent and patterns of population changes between the 1980s and 2003-04 (Amar et al. 2006). The data consisted of 252 sites surveyed by point counts ('the RSPB data') and 92 sites surveyed by territory mapping ('the BTO data'). Potential causes of population changes were assessed through the collection of data on a number of covariates at each woodland site surveyed and through the collation of data on climate change and landscape structure. The results of RWBS analyses at the level of individual species suggested that habitat changes, possibly brought about by a reduction in the active management of woods and / or increases in deer grazing, were the most likely causes of declines."

Review Of The Status Of Introduced Non-Native Waterbird Species In The Area Of African-Eurasian Waterbird Agreement: 2007 Update

Banks, A.N., Wright, L.J., Maclean, I.M.D., Hann, C & Rehfisch, M.M

British Trust for Ornithology

2008

From the executive summary: "A review has been carried out in order to update knowledge of the status and potential impacts of non-native introduced waterbirds in countries falling within the African-Eurasian Waterbird Agreement (AEWA) area."

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

The Effects Of Climate Change On Migratory Waterbirds Within The African-Eurasian Flyway

Maclean, I.M.D., Rehfisch, M.M., Robinson, R.A & Delany, S

British Trust for Ornithology

2008

From the executive summary: "This report describes the past and likely future impacts of climate change on waterbirds within the African-Eurasian Flyway. Waterbirds are likely to be amongst the organisms most adversely affected by climate change as they are associated with a habitat that is very vulnerable to changes in rainfall, evaporation and human-demand and because they migrate between different areas and could thus be deleteriously affected in any one of those areas. Coastal waterbirds will be also be affected by sea-level rise."

Predicting The Impact Of Future Agricultural Change And Uptake Of Entry Level Stewardship On Farmland Birds

Vickery, J., Chamberlain, D., Evans, A., Ewing, S., Boatman, N., Pietravalle, S., Norris, K & Butler, S

British Trust for Ornithology

2008

Further Use Of Aerial Surveys To Detect Bird Displacement By Offshore Wind Farms

Maclean, I.M.D., Skov, H & Rehfisch, M.M

British Trust for Ornithology

2008

An assessment of the feasibility of annual monitoring of winter gull roosts in the UK and possible outputs from such a scheme

Burton, N.H.K., Maclean, I..M.D & Austin, G.E

British Trust for Ornithology

2008

From the executive summary: "The recent 2003/04-2005/06 Winter Gull Roost Survey (WinGS) estimated that the UK supported over 3.75 million gulls in winter. As in previous surveys, estimates were produced using counts of gulls at roosts, which provide the best means to estimate total winter populations as sizeable proportions of species’ populations may be counted at relatively few key sites. Despite the importance of the UK to gulls, current annual monitoring of these birds – through diurnal Wetland Bird Survey (WeBS) counts – is limited. Here, we investigate the feasibility and worth of annual monitoring of (key) gull roost sites."

Lark Rise Farm, Barton, Cambridgeshire (Plot 1571) The Countryside Restoration Trust report on breeding birds 2005

Carter, N

British Trust for Ornithology

2008

No report identified

British Trust for Ornithology

Potential Use Of Population Viability Analysis To Assess The Impact Of Offshore Windfarms On Bird Population

Ilya M.D. Maclean, Morten Frederiksen, Mark M. Rehfisch

British Trust for Ornithology

2008

From the executive summary: "Although conventional impact assessments allow estimates of the number of birds that might collide with or be displaced by windfarms, such methods do not allow the overall effect on bird populations to be established. This report determines whether sufficient demographic information is available to carry out population viability analysis: one method of determining the impacts of offshore windfarms on bird populations."

New developments towards a more comprehensive assessment of trends in the wintering waterbird assemblage

Austin, G.E., Banks, A.N & Rehfisch, M.M

British Trust for Ornithology

200?

Westfield Farm, Cambs (Plot 1572) The Countryside Restoration Trust Report on Breeding Birds 2005

Carter, N

British Trust for Ornithology

200?

Ground and aerial monitoring for Carmarthen Bay SPA 2004-2007

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

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

Extensive monitoring of Arctic alpine birds in Scotland: a pilot survey to test the potential of using volunteer surveys

Calladine, J & Wernham, C

British Trust for Ornithology

200?

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

John Calladine, Graeme Garner and Chris Wernham

British Trust for Ornithology

2007

"This interim report documents the findings of fieldwork carried out during the 2006 breeding season to test approaches for surveying breeding Short-eared Owls."

The Breeding Bird Survey 2006

Raven, M.J., Noble, D.G & Baillie, S.R

British Trust for Ornithology

2007

"The twelfth annual report for the Breeding Bird Survey (BBS) allows us to look at the progress of the scheme over the past thirteen years, 1994–2006. We also present the survey coverage and bird population changes between the two most recent years, 2005–06. Data were collected from 3,295 1-km squares in 2006, representing a massive effort from our volunteer fieldworkers and Regional Organisers (ROs). We would like to take this opportunity to thank everyone who has contributed to the success of the BBS."

No report identified

British Trust for Ornithology

Monitoring survival of waders in Britain

Robinson, R.A., Burton, N.H.K., Clark, J.A & Rehfisch, M.M

British Trust for Ornithology

200?

Timing of breeding of moorland birds in Wales

Newson, S.E., Crick, H.Q.P., Clark, J.A & Moss, D

British Trust for Ornithology

200?

Monitoring bird distribution and behaviour on the Carmarthen Bay & Estuaries SAC at low tide

Banks, A.N., Maclean, I.M.D., Collier, M.P., Hainsworth, I., Howells, R.J & Hughes, D.S

British Trust for Ornithology

200?

Post-mortem analysis of bird corpses from the grounding of MSC Napoli

Grantham, M.J & Newson, S.E

British Trust for Ornithology

200?

The effects on waterbirds of dredging at the Cardiff Bay Barrage: report for 2006/07

Burton, N.H.K & Maclean, I.M.D

British Trust for Ornithology

200?

Changes in breeding bird populations due to housing development based on bird density and assemblages along urban-rural gradients

Henderson, I., Chamberlain, D., Davis, S & Noble, D

British Trust for Ornithology

200?

Towards developing thresholds for waterbirds that take into account turnover

Atkinson, P., Choquet, R., Frederiksen, M., Gillings, S., Pradel, R & Rehfisch, M.M

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

The effects of thinning in commercial conifer plantations on breeding bird abundance and diversity in the north of Scotland

Calladine, J., Humphreys, L & McPhie, F

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Changes in farmland bird abundance at Colworth 2000-2006 Final Report

Henderson, I., Clark, N & Holloway, S

British Trust for Ornithology

200?

Winter gulls in the UK: population estimates from the 2003/04-2005/06 Winter Gull Roost Survey

Banks, A.N., Burton, N.H.K., Calladine, J.R & Austin, G.E

British Trust for Ornithology

200?

An appraisal of "A review of goose collisions at operating wind farms and estimate of the goose avoidance rate" by Fernley, J., Lowther, S & Whitfield, P

Pendlebury, C

British Trust for Ornithology

200?

The BTO Barn Owl Monitoring Programme Sixth Year 2005

D.I. Leech, C.J. Barimore, H.Q.P. Crick & C.R. Shawyer

British Trust for Ornithology

2006

"The Barn Owl Monitoring Programme (BOMP) was set up in 2000 as a means of monitoring Barn Owl populations in the UK. This species is poorly monitored by other BTO surveys, such as the Breeding Bird Survey, as it is an elusive bird being mostly active at night, is largely non-vocal and occurs at low densities. To overcome these problems, BOMP methodology involves participants visiting known nest sites annually to ascertain whet her Barn Owls are using them each year and to collect data about the productivity of any breeding attempts observed. Each year the data are collated at the BTO and analysed, with the aim of producing annual trends in occupancy rates and a range of breeding parameters. The value of BOMP is shown by the inclusion of its results in the annual publication The State of the UK's Birds (e.g. Eaton et al . 2004) and in the reports of the Rare Breeding Birds Panel (e.g. Ogilvie & RBBP 2003). This report presents an analysis of the first six years of BOMP data (2000-2005)."

Declines of Afro-Palaearctic migrants: reviewing current information and developing hypotheses

Robinson, R.A & Clark, J.A

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Newport Wetlands Reserve: assessment of the SPA potential of a newly established wetland 2000/01 to 2005/06

Austin, G.E., Burton, N.H.K & Rehfisch, M.M

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

Avian Influenza incursion analysis (through wild birds)

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

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Use of aerial surveys to detect bird displacement by offshore wind farms

Maclean, I.M.D., Skov, H., Freeman, S.N., Rehfisch, M.M & Werner, P

British Trust for Ornithology

200?

The potential effects on birds of onshore development for the proposed Greater Gabbard Offshore Wind Farm: report for 2006

Burton, N.H.K., Holloway, S.J., Thewlis, R.M., Carter, N & Rehfisch, M.M

British Trust for Ornithology

200?

Lark Rise Farm, Barton, Cambs (Plot 1571) The Countryside Restoration Trust report on breeding birds 2004

Carter, N

British Trust for Ornithology

200?

Surveying waterbirds in Morecambe Bay for the Wetland Bird Survey (WeBS), Low Tide Count Scheme

Banks, A.N

British Trust for Ornithology

200?

Impacts of changes in sewage disposal on waterbirds wintering on the Northumbrian coast - Final report

Burton, N.H.K & Goddard, A

British Trust for Ornithology

200?

Developing a Scottish Wintering Waterbird Indicator

Austin, G.E., Banks, A.N & Rehfisch, M.M

British Trust for Ornithology

200?

The potential effects on birds of the Greater Gabbard Offshore Windfarm: report for February 2004 to April 2006

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

British Trust for Ornithology

200?

The Breeding Bird Survey 2005

Raven, M.J & Noble, D.G

British Trust for Ornithology

2006

"The eleventh annual report for the Breeding Bird Survey (BBS) allows us to look at the progress of the scheme over the past twelve years, 1994–2005. We also present the survey coverage and bird population changes between the two most recent years, 2004–05. Data were collected from 2,879 1-km squares in 2005, representing a massive effort from our volunteer fieldworkers and Regional Organisers (ROs). We would like to take this opportunity to thank everyone who has contributed to the success of the BBS."

2007 Non-estuarine coastal waterbird survey preparations and stratification

Austin, G.E., Holloway, S & Rehfisch, M.M

British Trust for Ornithology

200?

Assessment of the impacts of the Entry Level Scheme on bird populations: results from the baseline year, 2005

Chamberlain, D., Noble, D & Vickery, J

British Trust for Ornithology

200?

Qurm Environmental Information Centre (QEIC) Development Project: creation of natural lagoons and visitor facilities

Grieve, A., Holloway, S.J., Rehfisch, M.M & Fletcher, D.J

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

The effects on waterbirds of dredging at the Cardiff Bay Barrage Report for 2005/06

Burton, N.H.K & Holloway, S.J

British Trust for Ornithology

200?

The status of inland and coastal breeding Great Cormorants Phalacrocorax carbo in England

Newson, S.E., Ekins, G.R., Marchant, J.H., Rehfisch, M.M & Sellers, R.M

British Trust for Ornithology

200?

Declines in over-wintering diving ducks at Lough Neagh and Lough Beg: comparisons of within site, regional, national and European trends

Maclean, I.M.D., Burton, N.H.K & Austin, G.E

British Trust for Ornithology

200?

A survey and assessment of the birds of the Cam Washes and Berry Fen SSSIs Cambridgeshire, focussing on breeding and wintering waterbirds

Collier, M.P., Burton, N.H.K & Baylis, S

British Trust for Ornithology

200?

Westfield Farm, Cambridgeshire (Plot 1572) The Countryside Restoration Trust report on breeding birds 2004

Carter, N

British Trust for Ornithology

200?

Coverage of designated sites in England by BTO bird monitoring schemes: a review to 2005

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

British Trust for Ornithology

200?

The production of population trends for UK mammals using BBS Mammal Data: 1995-2004 update

Newson, S.E & Noble, D.G

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Unravelling the migration and moult strategies of a long-distance migrant using stable isotopes: Red Knot Calidris canutus movements in the Americas.

Atkinson, P.W., Baker, A.J., Bevan, R.M., Clark, N.A., Cole, K.B.,Gonzalez, P.M., Newton, J., & Robinson, R.A

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

The BTO Barn Owl Monitoring Programme: Fifth Year 2004

D.I. Leech, H.Q.P. Crick & C.R. Shawyer

British Trust for Ornithology

2005

The BTO Barn Owl Monitoring Programme (BOMP) was set up in 2000 with the aim: to monitor Barn Owl populations through standardised recording of nest occupancy rates, breeding performance and survival at a set of Barn Owl nest sites broadly representative of the Barn Owl in Britain. This 64 page report summarises the findings following the fifth year of the programme.

A pilot study to test the efficacy of field methods for wide scale monitoring of Ptarmigan in Scotland

Calladine, J

British Trust for Ornithology

200?

A Continuation Survey Of Nightjars Caprimulgus europeaus On SSSIs In East Anglia 2005

Gerry Conway and Ian Henderson

British Trust For Ornithology

2005

"A total of seventy-one 1-km squares within SSSI's in East Anglia, were identified as requiring coverage during 2005. A total of twelve territorial Nightjars were located within SSSI boundaries, which had not been recorded in 2004. Eight territorial males were located within the original set of seventy-one survey squares and a further four territorial males in adjacent survey squares."

No report identified

British Trust for Ornithology

Analysis of Islay Greenland White-fronted Anser albifrons flavirostris and Barnacle Branta leucopsis Goose datasets

Pendlebury, C., Wernham, C & Rehfisch, M

British Trust for Ornithology

200?

The potential effects on birds of the Greater Gabbard offshore windfarm Report for February 2004 - March 2005

Banks, A.N., Burton, N.H.K., Austin, G.E., Carter, N., Chamberlain, D.E., Holt, C., Rehfisch, M.M., Wakefield, E & Gill, P

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Impacts of changes in sewage disposal on populations of waterbirds wintering on the Northumbrian coast Report for 2004/05

Burton, N.H.K & Goddard, A.P

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

Climate change and migratory species

Robinson, R.A., Learmonth, J.A., Hutson, A.M., Macleod, C.D., Sparks, T.H., Leech, D.I., Pierce, G.J., Rehfisch, M.M & Crick, H.Q.P

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

No report identified

British Trust for Ornithology

The BTO Barn Owl Monitoring Programme: Fourth Year 2003

D.I. Leech, H.Q.P. Crick & C.R. Shawyer

British Trust for Ornithology

2005

The BTO Barn Owl Monitoring Programme (BOMP) was set up in 2000 with the aim: to monitor Barn Owl populations through standardised recording of nest occupancy rates, breeding performance and survival at a set of Barn Owl nest sites broadly representative of the Barn Owl in Britain. This 64 page report summarises the findings following the fourth year of the programme.

Winter mammal monitoring - a pilot study

Noble, D.G., Carter, P., Harris, S., Leech, D., Poulton, S & Shearer, G

British Trust for Ornithology

200?

The value of the sugar beet crop for birds and the farm environment Report A - uncropped headlands

Champion, G., Dewar, A., Gough, S., Haylock, L., Henderson, I & May, M

British Trust for Ornithology

200?

The Influence of the 2001 Foot and Mouth Disease Outbreak on Barn Owl Productivity in the UK

D.I. Leech, A. Banks & H.Q.P. Crick

British Trust for Ornithology

2005

Birdfacts: Species Profiles Of Birds Occurring In Britain and Ireland

R.A. Robinson

British Trust for Ornithology

2005

This is an on-going, online project. See https://www.bto.org/about-birds/birdfacts.

From the home page: "Birdfacts is designed to help you find out more about British birds. It covers all species that have been recorded in the wild in Britain. For all species we provide some key summary information, for the more regularly occuring species we aim to provide more detail. Where possible, we provide links directly pages where survey results are presented, so that you get the most up-to-date results. We also try to provide references to the original data sources, either directly on the species pages, or in the associated help page."

Estimating Great Cormorant Phalacrocorax carbo population changes as an aid to management

Baylis, S.M., Austin, G.E., Hughes, G.J., Musgrove, A.J & Rehfisch, M.M

British Trust for Ornithology

200?

Waterways Breeding Bird Survey: preliminary analyses of mammal data 1998-2003

Newson, S.E & Noble, D.G

British Trust for Ornithology

200?

The production of population trends for UK mammals using BBS mammal data: 1995-2003 update

Newson, S.E & Noble, D.G

British Trust for Ornithology

200?

The Breeding Bird Survey 2004 Report No 10

Raven, M.J., Noble, D.G & Baillie, S.R

British Trust for Ornithology

2005

"The tenth annual report for the Breeding Bird Survey (BBS) allows us to look at the progress of the scheme over the past ten years, 1994–2004. We also present the survey coverage and bird population changes between the two most recent years, 2003–04. Data were collected from 2,512 squares in 2004, representing a massive effort from our volunteer fieldworkers and Regional Organisers (ROs). We would like to take this opportunity to thank everyone who has contributed to the success of the BBS."

The effects of different crop stubbles and straw disposal methods on wintering birds and arable plants

Vickery, J.A., Atkinson, P.W., Marshall, J.H., West, T., Norris, K., Robinson, L.J., Gillings, S., Wilson, A & Kirby, W

British Trust for Ornithology

200?

No report identified

British Trust for Ornithology

Investigating possible movements of waterbirds between the Medway Estuary & Marshes SPA and neighbouring areas of the Thames and Swale Estuaries

Banks, A.N., Austin, G.E., Burton, N.H.K & Mellan, H.J

British Trust for Ornithology

200?