Arctic Tern. Edmund Fellowes

Britain and Ireland’s seabirds are in trouble and we need your support. Without it, our seabirds could be lost forever.

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Understanding birds

BTO has been at the forefront of bird monitoring and research since we were founded in 1933, and since that time we have accrued a vast body of knowledge. Sharing our understanding of birds is an important part of our work, helping to invigorate and inform our vital volunteer base and inspire the next generation of ornithologists to tackle the conservation challenges of the future.

Barn Owl. Les Foster
Delve deeper

BTO strives to provide a deeper understanding of birds their behaviour. BirdFacts is a one-stop shop for data on British birds.Read our masterclass articles covering one aspect of ornithology in depth. Let us recommend what to read next in our book reviews.

Search for a bird species on BirdFacts

BirdFacts gives in depth information about all of the bird species recorded in the wild in Britain. For each one, BirdFacts is a one stop shop for details of its abundance, distribution, population trends, demographic factors and biometrics, along with other fascinating facts and trivia.

Gannet resting on a rock

Featured article

Birds and pollution — a masterclass

Increasing human activity brings more pollution into the environment. This can take many forms and can affect birds in a number of ways, as Nina O'Hanlon explains.

Kittiwake. Richard Jackson
Featured appeal

Our Lost Seabirds

The UK’s seabirds are struggling and they need our help to survive. BTO’s new campaign – Our Lost Seabirds – aims to turn the tide.


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