BTO Research Reports

BTO Research Reports

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, which includes BBS reports, Waterbirds in the UK (WeBS) reports and SMP 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.

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BirdTrends 2018

Author: Woodward, I.D., Massimino, D., Hammond, M.J., Harris, S.J., Leech, D.I., Noble, D.G., Walker, R.H., Barimore, C., Dadam, D., Eglington, S.M., Marchant, J.H., Sullivan, M.J.P., Baillie, S.R. & Robinson, R.A.

Published: 2019

The BirdTrends 2018 report is a one-stop shop for authoritative information about the population status of the common breeding birds of the wider UK countryside. The report is based on data gathered by the many thousands of volunteers who contribute to BTO-led surveys.

01.01.19

Reports BirdTrends

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Review of data and monitoring options for assessing the status of breeding wader populations in the Yorkshire Dales National Park

Author: Wilson M., Jarrett D., & Calladine J.

Published: 2018

Breeding waders are among the birds of highest conservation concern in the UK. The findings of recent national scale surveys suggest that the Yorkshire Dales National Park (YDNP) supports important breeding concentrations of several wader species. This report assesses the availability and quality of information relating to breeding populations of six of the most numerous wader species (Oystercatcher, Golden Plover, Lapwing, Snipe, Curlew, Redshank) in the YDNP. We make recommendations about how the ability of these datasets to inform the Park Authority (YDNPA) about wader population trends and distributions can be maintained or enhanced, and how this information can be deployed to inform planning for and management of waders in the YDNP.

31.12.18

Reports

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State of Birds in Wales 2018

Author:

Published: 2018

Produced jointly by RSPB, BTO, Natural Resource Wales (NRW) and the Welsh Ornithological Society (WOS) , this report provides a current overview of the state of breeding and wintering bird populations in Wales, as well as information about recent conservation initiatives. The State of Birds in Wales 2018 was published on 6 December 2018. This report includes an update of the latest Wales BBS trends for terrestrial and freshwater species, as well as the latest Wales WeBS trends for wintering waders, wildfowl and other waterbirds. Notable among the BBS results are the positive trajectories of Wales urban populations of House Sparrow, Feral Pigeon and Collared Dove relative to in the UK overall. Welsh House Martins are holding their own but Starlings are in steep decline. The Wales wild bird indicator, based on BBS results, tracks the declines since 1994 in both lowland and upland farmland bird species, as well as an upturn in woodland bird populations, the latter most notable over the past seven years. Patterns of change A special feature of this report is a section called ‘Patterns of change in Welsh birds’ in which key Wales-specific outputs of the 2007-11 Bird Atlas (Balmer et al. 2103) are highlighted. These include measures of the importance of Wales in supporting the UK breeding populations of Chough (76%), Pied Flycatcher (69%), Redstart (47%) and Honey Buzzard (47%) as well as significant proportions of the UK wintering populations of coastal species such Common Scoter and Guillemot as well as rarer winter visitors such as Brambling and Great Grey Shrike. The report also includes measures of long term changes (ca 40 years) in breeding range since the first breeding bird atlas. Farmland birds have fared worse, with half of all farmland species having suffered loss of breeding range, by over 50% in the case of Grey Partridge, Yellow Wagtail, Turtle Dove and Tree Sparrow. Birds of farmed uplands such as Curlew, Golden Plover, Black Grouse and Ring Ouzel also showed marked range loss. In contrast, most birds of wetlands had increased in range and new colonists to Welsh wetlands include Bearded Tit, Little Egret, Avocet and Mediterranean Gull. Birds of woodland and heaths had mixed fortunes with declines in the range of woodland specialists such as Willow Tit and Lesser Spotted Woodpecker balanced by increases in species that favour forest plantations such as Hobby, Nightjar, Siskins and Crossbills. Another group of species that has increased its range in Wales are the non-natives, in particular Canada Goose, naturalised Greylag Goose, Mandarin Duck, Muscovy Duck, Black Swan and Ring-necked Parakeet. Also included in the report are accounts of conservation projects to investigate movements in recently fledged Hen Harriers, studies of diet and habitat use by Hawfinch, migration routes of Greenland White-fronted Geese and research on the movements and habitat requirements of Curlew, one of Wales most vulnerable species. This report should be referenced as Bladwell, S., Noble, D.G., Taylor, R., Cryer, J., Galliford, H., Hayhow, D.B., Kirby, W., Smith, D., Vanstine, A. & Wotton, S.R. 2018. The state of birds in Wales 2018. The RSPB, BTO, NRW and WOS. RSPB Cymru, Cardiff

06.12.18

Reports State of Birds in Wales

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Updating information on the period of reproduction and prenuptial migration for UK and Irish species included on Annex II of the EU Birds Directive

Author: Massimino D. & Gillings S.

Published: 2018

Article 7(1) of the European Union’s Directive 2009/147/EC on the conservation of wild birds allows for the hunting of species included within Annex II, where such hunting does not jeopardise conservation efforts. Article 7(4) of the Birds Directive further clarifies that species should not be hunted during their reproductive period or, if the species are migratory, during their prenuptial migration. To ensure effective implementation of these requirements, the European Commission requires Member States to identify the extent of the reproductive period and, where applicable, the timing of prenuptial migration for species included on Annex II that occur on their territory. A review of the best available information on the period of prenuptial migration and reproduction of each huntable species, for each Member State where that species occurs, was first carried out in 2001. The review was updated in 2009 and again in 2014, primarily to fill in missing data, especially for new Member States, but also to address inconsistencies within the species information available. This research report uses the latest BTO information to provide a further update.

21.11.18

Reports

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