The Blackbirds in Gardens project will help us understand how Blackbirds use gardens, and the potential effects of the Usutu virus on their population in the UK. Update: The 2025 spring survey season ...

BTO scientists call for urgent investment in long-term monitoring and improved approaches to disease response, as avian influenza decimates a suite of bird species ...

Satellite technology is helping scientists from the British Trust for Ornithology (BTO) to better understand the pressures that the UK’s breeding Cuckoos face as they make annual migrations of 16,000 ...

Overview A summary of the fourth report by the Avian Population Estimates Panel, presenting population estimates of birds in Great Britain and the United Kingdom. Estimates of population size are a ...

A selected list of publications that involve WeBS data. This list does not include the WeBS annual reports. You can read these on our dedicated Wetland Bird Survey Annual Report page. Austin, G.E.

Many BTO Garden BirdWatchers have a keen interest in other types of wildlife, which is why we also enable participants to records observations of visiting mammals, butterflies, dragonflies, bees and a ...

Recording areas (usually counties) have a Bird Recorder who collates records often linked to the activities of local bird clubs. One of the aims of BirdTrack is to support the County Recorder network ...

Bird Atlas 2007–11 presents over 1,300 detailed maps for nearly 300 species, showing where each breeds and winters, where they are most and least abundant and where status is changing. The species ...

Ringing Groups are formed by people who wish to pursue a common interest in ringing related bird studies. All of the groups below are currently registered with the BTO and operating using BTO rings.

Song and Mistle Thrush are two garden species that are readily confused; both are grey-brown in appearance and both have a spotted breast and pale legs. However, with good views and the right pointers ...

Bird Atlas 2007–11 was one of the most ambitious volunteer projects ever undertaken, mapping birds in both winter and the breeding season from every inch of Britain and Ireland. The fieldwork is now ...

Plumage differences caused by pigmentation changes Changes in the amount and/or distribution of particular feather pigments are some of the most commonly reported types of plumage abnormality. Most ...