Waterbirds in the UK
The Wetland Bird Survey (WeBS) is the principal scheme for monitoring the UK’s wintering waterbird populations, providing an important indicator of their status and the health of wetlands.
Survey results are reported in the annual publication Waterbirds in the UK, which comprises a summary report and updated species and sites numbers and trends and Low Tide maps via the WeBS Report Online interface. The report is published in the spring following the end of each WeBS year (which runs from July to June).
All WeBS annual summary reports are available for download. The current format, of dual publication of a summary report together with sites and species data online, began with Waterbirds in the UK 2011/12.
WeBS Report Online
Maximum counts for all sites, species indices and trends by country, low tide distribution maps and more are available on the WeBS Report Online interface.
For more detail on how the information is presented and important interpretation notes, please see the brief guide to WeBS Report Online and the comprehensive document WeBS Survey Methods, Analysis and Presentation (PDF, 2.78 MB).
An extended principal sites table listing all sites with over 10,000 birds is available.
The annualindices1516.xls (XLS, 803.00 KB) spreadsheet contains one sheet per species (named with their two-letter codes - the top sheet gives the species name for each species code). For each species, the latest index and associated trend values are shown for UK. Note also that not all regional index values start at the same year, for reasons of data availability. Please read the important interpretation notes above before using these data.
The latest WeBS data/annual report should be cited as:
Teresa M. Frost, Graham E. Austin, Neil A. Calbrade, Colette Hall, Heidi J. Mellan, Richard D. Hearn, David A. Stroud, Simon R. Wotton and Dawn E. Balmer. 2017.Waterbirds in the UK 2015/16: The Wetland Bird Survey. BTO, RSPB and JNCC, in association with WWT. British Trust for Ornithology, Thetford.