Garden BirdWatch (GBW)

Garden BirdWatch monitors the changing fortunes of birds and other garden wildlife through its network of 'citizen scientists'. Observations collected by BTO Garden BirdWatchers are analysed by BTO researchers and published in leading journals. BTO Garden BirdWatchers have charted the decline of the House Sparrow, the rise of the Woodpigeon, have discovered that urban birds get up later than their rural counterparts and have alerted conservationists to the impact of an emerging disease in Greenfinches. Find out more about Garden BirdWatch.


Latest GBW News

Warm weather boosts garden butterflies

All it takes is a few days of warm sunshine for butterfly numbers to rocket, and in April they did just that. The latest Garden BirdWatch results show fantastic new records for Peacock, Small Tortoiseshell and Brimstone. 

Blue Tit, by Jill Pakenham

Garden BirdWatch celebrates 20 years

This year we're celebrating 20 years of GBW 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.
  • 481 different species have been recorded from several taxa. 
  • 30,271 gardens have contributed at least one week of 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.
Wren, by John Harding

Cold weather boost to garden bird numbers

Until recently, it looked like garden bird numbers were going to stay as low as they were during the winter of 2013/14. However, with large parts of the country now experiencing frosts and snow, preliminary Garden BirdWatch results show that our garden birds are moving back in.