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

Hedgehog by Sarah Kelman

The State of Britain's Hedgehogs 2018

The State of Britain’s Hedgehogs 2018 has just been published! Thank you to all of you who record mammals in your garden for BTO Garden BirdWatch. The report uses our BTO Garden BirdWatch data in conjunction with other surveys, to help form a picture of how Hedgehogs are faring in the UK.
Blackcap by Gary Loader

Return of the winter Blackcaps - a geolocator story

Last year researchers from the BTO, Oxford University, and Exeter University began teaming up with bird ringers and garden owners across Britain and Ireland to study the Blackcaps that visit our gardens in winter. Last winter 36 Blackcaps were fitted with geolocators, miniature devices that track movements throughout the year; however, the birds must be recaptured in order to retrieve the device and data, which can be a challenge. We now have an exciting new update to report - find out the latest on the Demog Blog.
Coal Tit. Photograph by Jill Pakenham

Biggest-ever influx of one of our smallest garden birds

Coal Tits ­are seen in more gardens during the winter, and are generally recorded by at least 40% of Garden BirdWatchers in November, when they are driven to garden bird feeders by cold weather. This year is turning out to be exceptional, with Coal Tits seen in an unprecedented 70% of gardens in November! In some years they are seen in many more gardens, and research using GBW data has shown that their presence is affected by seasonal availability of tree seed crops in the wider countryside.