Welcome to the BTO

Looking out for birds? Share your interest in birds with others by being part of the BTO. Volunteer surveyors, members and staff work in partnership to provide unbiased information about birds and their habitats. Join or volunteer today and make birds count!

BTO website maintenance - Thursday 2nd April

From 7am  to 9am on Thursday 2nd April the BTO website may be unavailable due to scheduled maintenance.

BTO survey data entry pages will still be available during this time. We apologise for any inconvenience this may cause and endeavour to restore all services as soon as possible.

Blue Tits, by John Harding

Garden BirdWatch celebrates 20 years

This year we're celebrating 20 years of Garden BirdWatch and we'd like to thank our dedicated supporters - without them there wouldn't be a survey. In the last 20 years GBW volunteers have contributed an astonishing 7.3 million hours of their time submitting just under 100 million observations. From this data, an average of one scientific paper has been produced per year including several investigating the decline of the UK's House Sparrow population, which was first discovered through the BTO's garden-based data.

House Martin by Peter Dedicoat

Select a square for the House Martin Survey

We’re looking for volunteers to take on a 1-km square for the new House Martin Survey this year. Just three visits are required from late May onwards. Have a look at the available random squares to see if there is a square near you. The survey requires you to find and map House Martin colonies in the square and to count occupied nests.

Chaffinch by Edmund Fellowes

Latest Bird ID Video: Chaffinch & Brambling

Chaffinch is one of our most common and familiar birds, but young birds and females are harder to identify than the colourful males. In winter, Chaffinches are joined by their northern cousins, Brambling. How can you pick them out in the midst of Chaffinches? Take a look at our latest Bird ID Video: Chaffinch & Brambling.

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