The Chaffinch population has fallen by a quarter in just five years.
How you can help
There are lots of ways you can contribute. Many help us by taking part in our fieldwork surveys - but you can support us as a member, become a regional organiser, help at an event, or donate to an appeal. However you choose to support us - thank you.
Featured project
Garden BirdWatch
Take PartHelp with research into garden wildlife by joining our Garden BirdWatch network.
Leaving a gift in your Will to BTO
BTO depends on the generosity of supporters who decide to leave a gift in their Will. Consider leaving a legacy for the next generation.
Learn more
If you value impartial science that makes a difference, support BTO with a regular donation.
DonateMake your birdwatching count by taking part in a BTO project today
Volunteer
Chaffinch Appeal
The UK breeding population of Chaffinch has fallen by a quarter in just five years - we urgently need your help to understand why.
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