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Swedish Butterfly Monitoring Scheme, annual report for 2010

  • Lars Pettersson
  • Sanna Harris
  • Kajsa Mellbrand
Publishing year: 2011
Language: English
Document type: Report
Publisher: Department of Biology, Lund University

Abstract english

This is the first annual report for the Swedish Butterfly Monitoring Scheme, a new national monitoring programme coordinated by Lund University for the Swedish Environmental Protection Agency. The programme was initiated in 2010, and is a partnership between the Entomological Society of Sweden, the Swedish Environmental Protection Agency, Lund University, the Swedish University of Agricultural Sciences and the Swedish County Administration Boards. The monitoring scheme is volunteer-based and runs from April 15th to September 15th annually. Sites are visited 3-7 times per season and are surveyed using a standardized, common methodology. Two different recording methods are used in the Swedish Butterfly Monitoring Scheme. One is the point site counts which cover an area with a 25 m radius for 15 min per visit. The other method is fixed-route Pollard walk transects, typically 1-3 km in length. These two methods enable the monitoring scheme to assess yearly changes both in the number of butterflies seen and in species composition. The first year’s monitoring has produced butterfly data from 59 fixed-route walks and 108 point sites, and the number of locations was almost six times more than expected. The sites and walks are located across the whole country, from Malmö in the South to Luleå in the North. In 2010, 117 volunteer recorders have joined the Swedish Butterfly Monitoring Scheme and have counted nearly 30 000 butterflies of 83 different species. On average, 12.3 species have been observed at the point sites while 20.3 have been observed along transects. In this report, observations from 2010 of each species are shown as total counts, distribution maps, and flight period histograms. The most numerous species in 2010 was the Ringlet. As yearly observation data accumulate, butterfly population trends will be analysed, both nationally within the Swedish Butterfly Monitoring Scheme and internationally within the network Butterfly Conservation Europe.


  • Ecology
  • butterfly
  • butterflies


  • ISBN: 978-91-7473-173-6
Lars B. Pettersson
E-mail: lars [dot] pettersson [at] biol [dot] lu [dot] se



+46 46 222 38 18

+46 70 611 63 45



Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden