Britain’s best-loved birds could disappear from much of our coastline
04 Nov 2021 | No. 2021-49
Britain’s Puffins, which are among the nation’s best-loved birds, could largely disappear as a result of climate change over the coming years, new research reveals.
A study from the British Trust for Ornithology, being published on 4 November 2021, indicates that the UK's Puffin population could plunge by as much as 90 per cent by 2050 because of changes in the marine environment caused by rising temperatures, if global warming is not checked.
“This could represent a loss of over a million birds,” said BTO CEO, Professor Juliet Vickery. “There is a very real chance that our grandchildren may never know what it is like to see a Puffin in Britain and Ireland.”
With their comical gait and brilliantly coloured breeding season bills, Puffins are among the most popular sights in the UK's coastal nature reserves, such as the Farne Islands off the coast of Northumberland, where they can be observed at close quarters.
But increasing water temperatures are having a negative impact on sandeel numbers in British waters, the small fish which are their main prey species – meaning that the breeding productivity of the Puffins themselves is being adversely affected.
According to the BTO report, this is also affecting other seabirds, such as Kittiwake; in all, 11 of our 20 breeding seabird species are regarded as being highly vulnerable to future climate change. The seabird numbers that the UK holds are internationally important.
“If we are to hold onto our important bird populations then we need governments to make the right decisions for nature and the climate at COP26, and to invest in real action towards meeting these commitments. We will also need to continue to monitor the results of our actions – to evaluate what works and what doesn’t,” Professor Vickery said.
Dr James Pearce-Higgins, Director of Science at BTO and author of the report, said, “This new analysis reveals that, overall, one in five UK bird species will be affected by climate change. It is not just our seabirds that will be impacted; we will lose some of our best-loved summer visitors too. Once familiar migrants, such as Cuckoo and Spotted Flycatcher, have already seen their breeding populations more than halved during the last 25 years."
He added, "Changing conditions here in the UK may have some impact, but the effects of changing weather patterns on the wintering grounds in Africa and along the migration routes used by these migrant birds may also be important. Projecting the future fortunes of these and other migrant birds is challenging given their complicated lives that cross continents. Securing their future will require international collaboration right along their flyway.”
Importantly, the report highlights those species that could be impacted by attempts to mitigate climate change, such as increased development of offshore renewables and widespread tree planting on upland habitats. Knowledge of bird numbers and distributions, gathered by BTO's network of 60,000 citizen scientists, can help to inform how and where these approaches can be used in ways that minimise any potentially damaging impacts on declining species.
The full report, Climate Change and the UK's Birds, can be read here www.bto.org/climate-change after the embargo is lifted.
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Report author Dr James Pearce-Higgins and BTO CEO Professor Juliet Vickery can be contacted for interview via the BTO press team.
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Climate Change and the UK's Birds - An increasing body of research demonstrates the impacts of climate change on bird species across the globe, revealing a suite of responses. The timing of bird breeding and of migration have both become earlier. These shifts in timing have averaged one to three days per decade. Climate change is driving a consistent poleward shift in the distribution of bird species, the rate of change exceeding 11 km per decade. Globally, bird population declines have been greatest where warming has been most rapid. Climate change is driving large-scale shifts in bird communities across the globe, and we are seeing a consistent simplification of bird communities as they become more similar to each other. Migratory bird populations are declining widely across the globe and migratory birds may be particularly exposed to the impacts of climate change.
Key findings from the report
Within the UK, breeding seabirds and upland breeding birds are the two groups most vulnerable to climate change.
Fourteen seabird species are regarded as being at risk of negative climate change impacts. These include Puffin, for which a population decline across Britain and Ireland of 89% is projected by 2050.
Tendencies for upland birds and seabirds to decline may be related to their more negative responses to temperature, whilst positive impacts of temperature may contribute to increases in wetland and non-native species.
Climate change has been one of the two most important drivers of breeding bird population changes since the 1970s.
Populations of long-distance migrants vary with conditions in Africa where they winter, and generally benefit from wet rainy seasons there. Warming in the UK, contrasted with mixed rainfall trends in Africa, has contributed to divergent breeding population trends between resident and migratory bird species.
We lack information about the extent to which climate change might be driving population trends for 132 (55%) of our breeding bird species and for most of our wintering birds. It is essential that we address these important knowledge gaps.
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