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Farmland Butterflies Flourish

by Butterfly Conservation
Date: 18/02/2014

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Farmland butterflies thrived last year after benefiting from the best summer weather for seven years, a survey has revealed.

Typical farmland species such as the Brimstone, Common Blue, Small Copper, Small Skipper, Large Skipper and Small Tortoiseshell all bounced back in 2013 after experiencing a crash in numbers during 2012.

The Wider Countryside Butterfly Survey (WCBS), which assesses the fortunes of common and widespread species, found that many farmland butterflies flourished as a result of long periods of warm, sunny weather last summer. The annual survey, running since 2009, counts butterflies in more than 850 randomly selected 1km-squares across England, Wales, Scotland and Northern Ireland to assess the health of butterfly populations across the wider countryside rather than at specially managed hotspots such as nature reserves.

Hedgerows and field margins that are characteristic of farmland are an important habitat for butterflies. Overall, the majority of farmland species recovered in 2013 after suffering one of the worst years on record for butterflies in 2012. Last year recorders saw an average of 85 butterflies of five species per survey made over July and August - almost double the numbers recorded in 2012.

The Small Tortoiseshell, which has suffered an ongoing decline, recorded its best summer since the start of WCBS. More than 6,833 individuals were counted with the butterfly seen in 80% of squares compared to just 40% in 2012.

Following an appalling 2012, the Common Blue also enjoyed a good year with an average five-fold increase in abundance per-square. The Small Copper and Brimstone also thrived - and were both more widespread and abundant than in the previous year.

The Large White and Small White, commonly known as the 'cabbage whites' were also recorded in profusion with more than twice the number of Large Whites counted per square and five times the number of Small Whites in 2013 than in 2012.

For the fifth year in succession the Meadow Brown was the most widespread and abundant species. The butterfly was recorded in more than 90% of squares with 8,000 more butterflies counted in 2013 than 2012.

The Holly Blue and Red Admiral were among the minority of species that didn't have such a good year with numbers down for both compared to 2012.

WCBS Co-ordinator Dr Zoe Randle from Butterfly Conservation, said: "Farmland butterflies really thrived last year primarily due to the fantastic summer weather which provided ideal conditions with several recording their best ever WCBS results."

Kate Risely, who co-ordinates the Breeding Bird Survey butterfly surveyors at the BTO, said: "It's great news that populations of widespread butterfly species increased in 2013. "These results demonstrate the value of large-scale volunteer surveys for monitoring country-wide trends in butterfly numbers. Recording butterflies and birds at the same sites gives us a unique insight into the health of our countryside."

The WCBS is run by Butterfly Conservation, the British Trust for Ornithology (BTO) and The Centre for Ecology & Hydrology (CEH) as part of the United Kingdom Butterfly Monitoring scheme (UKBMS).

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Contacts
For interviews and images contact the Butterfly Conservation Press Office:
news@butterfly-conservation.org 01929 406 005

To contact the BTO: kate.risely@bto.org 01842 750 050

To contact The Centre for Ecology & Hydrology (CEH): Barnaby Smith bpgs@ceh.ac.uk 07920 295 384

The WCBS is funded by a multi-agency consortium including Natural Resources Wales, Defra, the Joint Nature Conservation Committee, Forestry Commission, Natural England, the Natural Environment Research Council and Scottish Natural Heritage. The WCBS is indebted to all volunteers who contribute data to the scheme.

Butterfly Conservation is the UK charity dedicated to halting the rapid decline of butterflies and moths and protecting our environment. We run conservation programmes for more than 100 threatened species and manage over 30 nature reserves. www.butterfly-conservation.org

The BTO is the UK's foremost independent bird research organisation and organises a range of annual and periodic surveys, mainly on birds, and including the BTO/JNCC/RSPB Breeding Bird Survey. Information on population trends in birds and other wildlife are provided on our website (www.bto.org) and you can follow the latest news and developments via twitter @_BTO.

The Centre for Ecology & Hydrology (CEH) is the UK's Centre of Excellence for integrated research in the land and freshwater ecosystems and their interaction with the atmosphere. CEH is part of NERC, employs more than 450 people at four major sites in England, Scotland and Wales, hosts over 150 PhD students and has an overall budget of £35m. CEH tackles complex environmental challenges to deliver practicable solutions so that future generations can benefit from a rich and healthy environment. www.ceh.ac.uk You can follow the latest developments in CEH research via twitter @CEHScienceNews and our rss news feed http://www.ceh.ac.uk/rss/rss.xml

If you have any questions or require more information about this press release, please contact Butterfly Conservation by email.

About Our Press Releases

Butterfly Conservation Warwickshire regularly issue press releases on issues in relation to butterfly and moth conservation in the Coventry, Warwickshire and Solihull area alongside occasional press releases covering national stories from Butterfly Conservation's head office.

If you require further information about a specific press release, please contact the specific press release author.

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Notes For Editors
Butterfly Conservation is the largest conservation charity of its type in Europe with over 13,000 members in the UK. Its aim is the conservation of butterflies, moths and their habitats. It runs conservation programmes on over 60 threatened species of butterfly and moth, organises national butterfly recording and monitoring schemes, and manages over 30 nature reserves.

Further information at: www.butterfly-conservation.org