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  3. www.gov.uk › government › statistics5 – Farmland species - GOV.UK

    May 7, 2024 · Download the data for Figure 5.5 in ods format. Notes about figures 5.4 and 5.5. This indicator includes individual measures for 22 species of butterflies, the farmland index, however, only ...

  4. www.gov.uk › government › statisticsButterflies in the United Kingdom and in England: 2023

    • Contact
    • Summary
    • Habitat Specialists
    • Species of The Wider Countryside
    • Additional Wider Countryside Indices
    • UK ‘All-Species’ Index
    • Background and Methodology
    • National Statistics Accreditation
    • Web Links

    Enquires on this publication to: enviro.statistics@defra.gov.uk Tel: 03459 335577 (Defra enquiries) Find out more about call charges at – GOV.UK (www.gov.uk) Lead statistician: Clare Betts Environmental Statistics and Reporting team, Department for Environment, Food and Rural Affairs, Mallard House, Kings Pool, 3 Peasholme Green, York, YO1 7PX Webs...

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    This release covers 2 measures of annual butterfly population abundance in the UK: the first for habitat specialist butterflies (species strongly associated with semi-natural habitats such as chalk downland) and the second for more widespread butterflies found in both semi-natural habitats and the wider countryside. Both indices contain data back t...

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    Habitat specialist butterflies, which are vulnerable to semi-natural habitat loss and fragmentation, have not recovered from declines experienced in the late 1970s. These declines were mainly attributed to the knock-on effects of the drought conditions experienced in 1976. Analysis of the smoothed trend for habitat specialist butterflies shows a si...

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    The butterflies of the wider countryside index for the UK has not changed in either the long-term (1976 to 2022) or the short-term (2017 to 2022) (Figure 4.1). Individual butterfly species again fare differently within the overall trend. Species of the wider countryside showing the greatest long-term declines include wall; small tortoiseshell; and ...

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    Butterflies of the wider countryside on farmland Analysis of the smoothed trend for butterflies of the wider countryside on farmland over the long-term period (1990 – 2022) shows a slight decline. There has been no change in the abundance of butterflies of the wider countryside on farmland since 2017 (Figure 5.1). Individual butterfly species fare ...

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    The ‘all-species’ butterflies index for the UK shows significant declines in both the long and short term. This assessment of change is made on an analysis of the smoothed trend; long-term (1976 to 2022) and short-term (2017 to 2022) (Figure 6.1). Individual butterfly species fare differently within the overall declining long-term trend. Species in...

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    Assessment

    Long and short-term assessments of the statistical significance of changes over time (since the time series began in 1976 and over the latest 5 years – 2017 to 2022) are based on smoothed data, with the analysis of the underlying trend performed by the UKBMS. Confidence intervals around the trend line are calculated and a statistical test is used to compare the difference in the smoothed index between the most recent year and the previous years in a series. See the accompanying technical docu...

    Relevance

    Butterflies are considered to provide a good indication of the broad state of the environment because they respond rapidly to changes in environmental conditions and habitat management, occur in a wide range of habitats, and are representative of many other insects, in that they utilise areas with abundant plant food resources. Butterflies are complementary to birds and bats as indicator species, especially the habitat specialists, because they use resources in the landscape at a much finer s...

    Background

    Although the UKBMS started in 1976, Butterfly Conservation, one of the main partners of this monitoring scheme, conducted additional analysis to examine butterfly occurrence before this year. The UK experienced a severe drought in 1976 and declines in butterfly populations were primarily attributed to the knock-on effects of the drought. However, the additional analysis revealed that 1976 was not an exceptional year (Figure 7.1). Figure 7.1 shows the combined indices of occurrence (with confi...

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    Defra is currently undergoing the process of obtaining National Statistics accreditation for these statistics: National Statistics are accredited official statistics following an independent review by the Office for Statistics Regulation (OSR). To receive this accreditation, Defra has to fulfil 4 requirements as set out in OSR’s assessment report. ...

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    The State of UK’s Butterflies in 2015is available on the UKBMS website Further information about the UK Butterfly Monitoring Schemeis available on the UKBMS website Further information about the state of Britain’s butterfliescan be found on the Butterfly Conservation website The butterfly indicators included within this release together with additi...

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  5. assets.publishing.service.gov.uk › media › 5a7f03dDE6 Indices of farmland butterfly populations: England - GOV.UK

    The overall population of 43 species of butterflies (comprising Species of the Wider Countryside (21) and Habitat Specialists (22)) on farmland has fluctuated over the last 20 years with peaks at...

  6. www.gov.uk › government › statisticsButterflies in the United Kingdom and in England: 2023

    Oct 20, 2015 · Trends in butterflies: habitat specialists and species of the wider countryside in the UK and in England.

  7. assets.publishing.service.gov.uk › media › 65509ffb6England Biodiversity Indicators technical background document

    The England Biodiversity Indicators use multi-species (composite) indices of abundance for butterflies in different habitats, for example, farmland and woodland. Composite indices are

  8. butterfly-conservation.org › sites › defaultAtlas of UK Butterflies 2015-2019 - Butterfly Conservation

    This report presents UK distribution maps for all resident and regular migrant butterfly species (except Large Blue) based on the most recent five-year survey of the Butterflies for the New Millennium (BNM) recording scheme (2015-2019).

  9. butterfly-conservation.org › butterflies › the-stateThe State of the UK's Butterflies | Butterfly Conservation

    Drawing from our world-leading recording and monitoring schemes, these influential reports set out the key results for butterfly species, highlight the implications of recent research and policy initiatives, and make recommendations for the conservation of UK butterflies and wider biodiversity.