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.
Updated biodiversity indicators
The updated set of 24 Government Biodiversity Indicators for 2019 were published on 5 September. This document includes 'C5 Birds of the Wider Countryside and At Sea', which shows the...
The environmental predictors of spatio-temporal variation in the breeding phenology of a passerine bird
Warmer springs have seen many of our birds breeding earlier, but scientists still do not know how they actually decide when to start building nests and laying eggs. Do they respond directly to...
Avian malaria linked to decline in London's House Sparrows
During a three-year study led by the ZSL Institute of Zoology, in collaboration with the RSPB and later BTO, almost 400 individual House Sparrows were colour-ringed to allow their survival to be...
Agri-environment effects on birds in Wales: Tir Gofal benefited woodland and hedgerow species
<p>Comparative biometrics of British Marsh Tits Poecile palustris and Willow Tits P. montana</p>
An efficient survey method for estimating populations of marsh tits Poecile palustris, a low-density woodland passerine
Associations between gamebird releases and general predators
Every year, 41-50 million non-native gamebirds (Pheasant and Red-legged Partridge) are released in the UK. Fewer than half these birds are shot, meaning there is potentially a large food resource...
How can assemblage structure indices improve monitoring of change in bird communities using ongoing survey data?
Is bird feeding changing Britain's garden bird communities?
The study’s authors extracted information from advertising in the RSPB’s Birds magazine over a 40 year period to show how the number and variety of bird food products has risen during this time....
Tell us about the wildlife in your garden
Answer a quick series of simple questions to tell us more about the widlife in your garden for this partnership project with BBC Springwatch.
BBS Report reveals impact of 'Beast from the East'
The new BBS report shows the impact that severe 2018 weather may have had on some of our birds. The Beast from the East hit some of our smaller resident birds whilst strong desert winds hampered...
North Wales Urban Gull Survey
Participate in a one-off survey of urban Gulls in North Wales this spring.
A review of raptor and owl monitoring activity across Europe: its implications for capacity building towards pan-European monitoring
Can bird abundance declines be detected by citizen science programmes? A case study using Common Cuckoo Cuculus canorus
Waders wane while geese gain
The work gives revised population estimates for 98 different species that winter in Great Britain, using data collected by many thousand birdwatchers to calculate either the average peak winter...
Spotted Flycatcher Appeal
One of our most treasured songbirds, the Spotted Flycatcher, is disappearing. Once considered a common garden nesting species, the Spotted Flycatcher is now a bird that many people are willing to...
Effects of individual misidentification on estimates of survival in long-term mark–resight studies
Land sparing and bird conservation
It has been argued, however, that wildlife-friendly farming might be more appropriate away from tropical deforestation ‘frontiers’. In the UK, for example, some species which depend on large areas of...
Spatial and habitat variation in aphid, butterfly, moth and bird phenologies over the last half century
Global warming has advanced the timing of biological events, potentially leading to disruption across trophic levels. The potential importance of phenological change as a driver of population trends...
Representing migration routes from re‑encounter data: a new method applied to ring recoveries of Barn Swallows (Hirundo rustica) in Europe
Habitat- and species-mediated short- and long-term distributional changes in waterbird abundance linked to variation in European winter weather.
Open access atlases
The first breeding atlas – the first national bird atlas anywhere in the world - conducted during 1968–72, was described at the time as “a huge step forward in our knowledge of the distributions of...
Help monitor waders in NI grasslands
Help investigate whether Northern Irish lowland grasslands are supporting breeding waders.