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Trends in butterfly species, England 1990 to 2016 data

Trends in populations of selected butterfly species - England

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Insects of the wider countryside (butterflies)
Trends in butterfly populations in England
Index (1990 = 100)
Year Widespread butterflies on farmland in England (21 species) Widespread butterflies in woodland in England (23 species)
Unsmoothed Smoothed Smoothed index lower 95% condifence interval Smoothed index upper 95% condifence interval Unsmoothed Smoothed Smoothed index lower 95% condifence interval Smoothed index upper 95% condifence interval

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