The effects of illuminating the roost entrance on the emergence behaviour of Pipistrellus pipistrellus

Nick Downs, V. Beaton, J. Guest, John Rosie Polanski, S. L. Robinson, Paul Adrian Racey

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


In an attempt to increase the accuracy of roost emergence counts for a monitoring programme, the exits of two Pipistrellus pygmaeus roosts were illuminated with light of different colours and intensities. Light intensity affected bat emergence more than light colour. At one roost there was no significant difference in the bat emergence pattern between when the roost exit received no illumination and when it was illuminated with red light. The use of the latter is proposed to increase the accuracy of bat roost emergence counts. (C) 2003 Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)247-252
Number of pages5
JournalBiological Conservation
Publication statusPublished - 2003


  • pipistrelle
  • Pipistrellus pygmaeus
  • light intensity
  • light colour
  • roost emergence
  • bats
  • BATS

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