Welcome to BirdFacts
Information about Britain's birds, where they live, what they do, and links to the latest survey results.
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More information about BirdFacts. For details on each type of data, click the relevant ? button on the species listing page.
If you spot any errors, missing information, or have a picture we could use for a species that does not have one already, please email us: birdfacts [at] bto.org.
Seen a bird you can't identify? Try to take a photograph and visit the iSpot website for help.
Belfast's Unsung Seabird
Despite the human hustle and bustle, Belfast Lough is at the heart of Eider conservation in Ireland. BTO's Senior Research Ecologist Kat Booth-Jones dives into research focused on this charismatic seabird.