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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Ryevitalise – Bats and ancient trees: 2022 report

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Published: 2022

Working with a network of volunteers, static acoustic bat detectors were deployed over a long survey season, to provide the third season of extensive bat data for the Ryevitalise Landscape Partnership Scheme area of the North York Moors National Park. This report provides an overview of the survey coverage and main results from 2022.

07.12.22

BTO Research Reports

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Belfast’s urban gulls: an assessment of breeding populations, breeding season movements and winter population

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Published: 2022

Despite the high conservation status of Herring and Lesser Black-backed Gulls, little is known about their urban populations Northern Ireland, and even less about how they use the urban environment. This project brings together a number of elements targeted at addressing knowledge gaps for the urban population of gulls in Northern Ireland, chiefly focusing on Belfast city centre. Firstly, breeding gulls in Belfast city centre were estimated using vantage point surveys, contributing to the latest national census and providing data for organisations wishing to reduce human-gull conflict. Secondly, the latest tracking technology was used to investigate how urban-nesting Lesser Black-backed Gulls and Herring Gulls use the urban environment of Belfast, complementing the population monitoring and existing tracking data from Herring Gulls breeding in a nearby coastal colony on Big Copeland Island. Thirdly, the wintering gull population using the shoreline of Belfast Lough was quantified using Wetland Birds Survey and Winter Gull Survey data, as congregations of gulls in the lough may interact with human activities in the lough. Combining these three elements, this study demonstrates that Belfast and the surrounding urban areas are providing not only nesting habitats for gulls, but also food resources which are used throughout the breeding season and during the winter. The presence of foraging gulls within the urban environment may be a symptom of poor waste management in certain regions of the city and may be a source of human-gull conflict.

20.05.22

BTO Research Reports

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Nesting dates of Moorland Birds in the English, Welsh and Scottish Uplands

Author:

Published: 2022

Rotational burning of vegetation is a common form of land management in UK upland habitats, and is restricted to the colder half of the year, with the time period during which burning may be carried out in upland areas varying between countries. In England and Scotland, this period runs from the 1st October to 15th April, but in the latter jurisdiction, permission can be granted to extend the burning season to 30th April. In Wales, this period runs from 1st October to 31st March. This report sets out timing of breeding information for upland birds in England, Scotland and Wales, to assess whether rotational burning poses a threat to populations of these species, and the extent to which any such threat varies in space and time.

17.02.22

BTO Research Reports

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Sensitivity mapping for breeding waders in Britain: towards producing zonal maps to guide wader conservation, forest expansion and other land-use changes. Report with specific data for Northumberland and north-east Cumbria

Author:

Published: 2021

Breeding waders in Britain are high profile species of conservation concern because of their declining populations and the international significance of some of their populations. Forest expansion is one of the most important, ongoing and large-scale changes in land use that can provide conservation and wider environmental benefits, but also adversely affect populations of breeding waders. We describe models to be used towards the development of tools to guide, inform and minimise conflict between wader conservation and forest expansion. Extensive data on breeding wader occurrence is typically available at spatial scales that are too coarse to best inform waderconservation and forestry stakeholders. Using statistical models (random forest regression trees) we model the predicted relative abundances of 10 species of breeding wader across Britain at 1-km square resolution. Bird data are taken from Bird Atlas 2007–11, which was a joint project between BTO, BirdWatch Ireland and the Scottish Ornithologists’ Club, and modelled with a range of environmental data sets.

09.12.21

BTO Research Reports

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Results of a tracking study of Wigeon to inform understanding of potential interactions with the National Grid Hinkley Connection Project

Author:

Published: 2021

As part of the consenting process for The National Grid Hinkley Connection Project, a tracking study was commissioned to track the movements of 15 Wigeon Anas penelope, with specific objectives to provide data on the flight paths that birds might take between the Severn Estuary SPA and the Somerset Levels and Moors SPA, and to explore how these relate to the route of the National Grid Hinkley Connection Project between Bridgwater and Seabank. Investigations also examined the frequency of movements through the winter period, and the flight heights and speeds of birds.

30.06.21

BTO Research Reports

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Fine-scale mapping of relative abundance and trends, and extraction of small-area population trends for breeding birds

Author:

Published: 2020

This report details work to evaluate two approaches for producing maps of relative abundance from BTO/JNCC/RSPB Breeding Bird Survey data. These maps could be useful for setting local conservation priorities and may be better than the published national Breeding Bird Survey trends at estimating abundance for areas with poor coverage or for rare and localised species.

29.04.20

BTO Research Reports

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Assessing the habitat use of Lesser Black-backed Gulls Larus fuscus from the Bowland Fells SPA in 2017 and 2018

Author:

Published: 2020

This report presents the results of GPS tracking of Lesser Black-backed Gulls (Larus fuscus) breeding at the Bowland Fells Site of Special Scientific Interest (SSSI) and Special Protection Area (SPA) in 2017 and 2018. The report builds on previous results from 2016. The aims of the study were to identify potential feeding areas and to quantify the amount of time spent by the gulls within the SPA boundary.

21.01.20

BTO Research Reports

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