Reports

Reports

BTO publishes various reports, from those covering the annual results of core surveys, through scientific studies, and on to those produced in partnership with other organisations. Many of these are published as BTO Research Reports, which includes BBS reports, Waterbirds in the UK (WeBS) reports and SMP reports. You can access all of our reports from here, though note that we are currently updating the reports section, working backwards through time to bring all of the report pages into a consistent format. You can read our Annual Report and Accounts in the Governance section.

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Bailiwick Bat Survey: 2021–2024 Report

Author:

Published: 2025

Working with a network of volunteer fieldworkers, static acoustic bat detectors were deployed over four survey seasons (2021–2024) to provide baseline data for bats on the islands of Guernsey, Alderney, Herm, Sark, Brecqhou, Burhou, Crevichon, Jethou and Lihou. This report provides an overview of the survey coverage and main results from the project.

09.09.25

BTO Research Reports

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A review of the Biological Defined Minimum Population Scale (BDMPS) approach and methodology to apportioning non-breeding season impacts on seabirds arising from offshore wind farms

Author:

Published: 2025

Estimates of breeding seabird populations are used to assess the potential impacts of proposed wind farm developments. The approach used in these assessments is known as the Biologically Defined Minimum Population Scales (BDMPS) method, and it was developed by Furness in 2015. This report evaluates the methods developed by Furness, and highlights potential refinements to the current BDPMS approach, including methods, definitions, and data resources, to improve future ease of use and accuracy of estimates.

14.08.25

BTO Research Reports

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