Behavioral Ecology and Sociobiology

, Volume 46, Issue 1, pp 43–49 | Cite as

Why do nocturnal orb-web spiders (Araneidae) search for light?

  • Astrid M. Heiling


The nocturnal orb-web spider Larinioides sclopetarius lives near water and frequently builds webs on bridges. In Vienna, Austria, this species is particularly abundant along the artificially lit handrails of a footbridge. Fewer individuals placed their webs on structurally identical but unlit handrails of the same footbridge. A census of the potential prey available to the spiders and the actual prey captured in the webs revealed that insect activity was significantly greater and consequently webs captured significantly more prey in the lit habitat compared to the unlit habitat. A laboratory experiment showed that adult female spiders actively choose artificially lit sites for web construction. Furthermore, this behaviour appears to be genetically predetermined rather than learned, as laboratory-reared individuals which had previously never foraged in artificial light exhibited the same preference. This orb-web spider seems to have evolved a foraging behaviour that exploits the attraction of insects to artificial lights.

Key words Web site choice Light preference Spider density Prey availability Larinioides sclopetarius 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Astrid M. Heiling
    • 1
  1. 1.Institute for Zoology, University of Vienna, Althanstrasse 14 A-1090 Vienna, Austria e-mail: Tel.: +43-1-313361283; Fax: +43-1-31336778AT

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