BTO relies heavily on the efforts of thousands of committed and skilled volunteers, who take part in our long-term monitoring schemes. The data they collect generate robust and long-term evidence describing changes in the populations of birds and other wildlife, which in turn prompts further research and conservation action. BTO continually innovates to improve survey design and ease of participation, while broadening our supporter base is a key aim for the future.
Analyses of simulated data provide assurance that the BBS trends for 1994 to 2021 (but are missing 2020) are robust and can be viewed with confidence.
BirdTrack migration blog (late May–mid June)
As spring progresses towards summer, migration continues to slow. Most breeding species will be either in the full throws of breeding or close to their breeding grounds.
Butterflies find safe haven in UK gardens
BTO Garden BirdWatch (GBW) is the UK’s largest structured bird survey, delivering over 25 years of weekly bird counts from more than 14,000 gardens, predominantly occupying suburban and rural...
BirdTrack migration blog (19–25 May)
A week of relatively settled conditions enabled a steady stream of late migrants to arrive, and allowed an occasional scarce species to make landfall.
Monitoring five decades of change in the UK’s rarest breeding birds through citizen science: the Rare Breeding Birds Panel
Waterbirds in the UK 2021/22: The Wetland Bird Survey and Goose & Swan Monitoring Programme
How important is it to standardise the measured mass of shorebirds weighed at varying intervals after capture?
This paper examines this phenomenon using captures of Knot, Turnstone, Dunlin and Semipalmated Sandpiper in Delaware Bay, USA. As these waders were caught whilst actively feeding on the eggs of...
Amazing nesters and nest monitoring
Bird breeding behaviours to watch out for this spring, and how to get started with nest monitoring.
A review of the impacts of air pollution on terrestrial birds
A review paper by BTO considers 203 studies of the effects of air pollution on 231 bird species. Of these studies, 82% document at least one negative effect associated with increasing levels of...
Read the BTO's latest BirdTrends report
The BirdTrends 2022 report is a one-stop shop for authoritative information about the population status of the common breeding birds in the UK.
The State of the UK’s Butterflies 2022
BTO joins Butterfly Conservation and the UK Centre for Ecology & Hydrology to report on long-term trends in abundance and distribution.
Curlew collaboration to boost breeding success
Research from BTO and the University of East Anglia reveals how land management can support the breeding success of this declining species.
Scoping the feasibility of developments to the Terrestrial Bird Indicator for Scotland – urban, farmland and wetland indicators
Conservation status of birds in Wales gets updated
Find out what the latest 'Birds of Conservation Concern' review means for species in Wales.
Framework for assessing and mitigating the impacts of offshore wind energy development on marine birds
Thoracic harnesses are not suitable for Kittiwake tagging studies.
Biologging devices including GPS and satellite tags, which attach to individual animals and collect information on their movements, are increasingly deployed in ecology and conservation research....
Diversity, fragmentation and connectivity in the UK amphibian and reptile data landscape
This paper sets out to fill this knowledge gap for UK reptiles and amphibians, identifying existing sources of biodiversity data for these taxa and then characterising the nature of the data...
The incursion of Highly Pathogenic Avian Influenza (HPAI) into North Atlantic seabird populations: an interim report from the 15th International Seabird Group conference
A review of the capacity of current avian monitoring schemes in Guernsey to assess the population status of breeding and wintering bird species.
Ringing and Nest Record Scheme data suggest weather is a better predictor of Swift breeding success than the availability of insect prey
Long-term trends of second generation anticoagulant rodenticides (SGARs) show widespread contamination of a bird-eating predator, the Eurasian Sparrowhawk (Accipiter nisus) in Britain
Scientists from the UK Centre for Ecology and Hydrology, BTO and Biomathematics and Statistics Scotland examined the carcasses of 259 Sparrowhawks which died between 1995 and 2015. Using preserved...
BirdTrack migration blog (23rd-29th September)
Given the seemingly unfavourable conditions over the past week, it has been a pleasant surprise to see such a diverse range of species on the move.