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
Biodiversity and the UK’s birds
Biodiversity loss is one of the biggest drivers of bird population declines in the UK.
Learn what we’re doing to tackle this threat to nature and how you can support our work.
our work on biodiversityBirds 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.
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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