Understanding birds
Delve deeper
We have been at the forefront of bird monitoring and research since 1933. Explore our vast body of knowledge with blogs, masterclass articles, data tools and more.
Birds on the BTO Blog
Cuckoos can’t change their clocks
Many bird species have shifted the timing of their spring migration in response to climate change – but the Cuckoo has not. Now we know why.
A journey through the bird breeding season
From Great Crested Grebes to Goldcrests, Dunnocks to Lapwings and Cuckoos, the breeding season is full of amazing nesters. Discover them today.
Foraging ‘fingerprints’ of Gannets
Understanding an individual bird's behaviour helps us predict how species may be affected by change. But how do we research a bird’s ‘personality’?
Explore our data
By species
BirdFacts gives in-depth information about all of the bird species recorded in the wild in Britain.
By postcode
Enter your postcode and Birds on your Doorstep shows you the changing fortunes of birds in your area.
Birds on your DoorstepMasterclass articles
Avian influenza
At BTO, we are dedicated to tackling the challenge of avian influenza (AI).
Learn more about the virus and the disease it causes, its impact on our wild birds, and the work we are doing to help devastated populations recover.
our work on AI
Featured article
Birds and pollution
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.
Bird identification video
Identifying Ruff
By learning how to recognise Ruff in their various guises through this video, you’ll be able to pick them out with confidence.
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