Journal of Insect Conservation

, Volume 15, Issue 1–2, pp 139–151 | Cite as

The development of butterfly indicators in the United Kingdom and assessments in 2010

  • T. Brereton
  • D. B. Roy
  • I. Middlebrook
  • M. Botham
  • M. Warren
Original Paper


The United Kingdom (UK) Government has national and international commitments to tackle the rate of biodiversity loss by 2010. Biodiversity indicators are used to measure and communicate progress in meeting these commitments. From 2005 onwards, butterflies have been adopted as Governmental biodiversity indicators in England, Scotland and for the UK as a whole. The indicators are compiled using butterfly abundance data collected through the UK Butterfly Monitoring Scheme, at a network of site established from 1976 onwards. The indicators show that butterfly numbers have fluctuated considerably from year-to-year, though analysis of the underlying smoothed multi-species trends for (habitat) ‘specialist’ species show significant long-term declines in each country since the 1970s. Trends in wider countryside ‘generalist’ species vary at the country-level from little or no overall change in Scotland and across the UK, to declines over selected years in England. Comparisons of changes in butterfly abundance before and after the 2010 target was set in 2002 suggest that the rate of decline at the UK-level is increasing for specialist species. In spite of large amounts of investment since 2000 to improve the habitat condition of protected areas, the trend for butterfly populations is no different in protected areas compared to elsewhere. Analysis by policy sector in England, shows that butterflies are declining rapidly in both forestry land and farmland, although in the latter habitat type, improvements are being seen on land entered into agri-environment schemes. We conclude by assessing the extent to which butterflies may represent broader biodiversity and help inform and evaluate conservation policy.


Butterfly monitoring Biodiversity indicators Abundance trends 2010 target Protected areas Agri-environment schemes UKBMS 



We are indebted to all the volunteer recorders and local co-ordinators who have contributed to butterfly monitoring in general and the UKBMS specifically since 1976. The UKBMS is a partnership between Butterfly Conservation and the Natural Environment Research Council, Centre for Ecology & Hydrology. The UKBMS is funded by a multi-agency consortium led by Defra, and including the Countryside Council for Wales, the Joint Nature Conservation Committee, Forestry Commission, Natural England, the Natural Environment Research Council, the Northern Ireland Environment Agency and Scottish Natural Heritage.


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • T. Brereton
    • 1
  • D. B. Roy
    • 2
  • I. Middlebrook
    • 1
  • M. Botham
    • 2
  • M. Warren
    • 1
  1. 1.Butterfly ConservationWarehamUK
  2. 2.Centre for Ecology & HydrologyMaclean BuildingWallingfordUK

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