05: Materials & Methods Dragonfly research


  • Bos, F. & M. Wasscher (1997) Veldgids nr 9: Veldgids Libellen. KNNV, Utrecht.
  • Brochard, C., D. Groenendijk, E. van der Ploeg & T. Termaat (2012) Fotogids larvenhuidjes van libellen. KNNV Uitgeverij, Zeist.
  • Brochard, C. & E. van der Ploeg (2014) Fotogids larven van libellen. KNNV uitgeverij, Zeist.
  • Dijkstra, K.-D. (2008) Libellen van Europa: veldgids met alle libellen tussen Noordpool en Sahara. Tirion Uitgevers BV, Baarn.
  • Wendler, A. & J.H. Nuss (2002) Libellen van Noordwest-Europa. Jeugdbonduitgeverij, Utrecht.

Imago observations:

  • All individuals are caugth with a specific insect net.
  • Detailed photographs are taken from all body parts.
  • After documentation the adult dragonfly it is released.
  • Photographs are stored in a database.
  • Observations are uploaded to Laij.fi (formerly Hatikka.fi)

Exuvia observations:

  • Waterbodies are visited from land or from the water by rowing boat or canoe. If possible, I walk in the water along the coastline.
  • Especially in case of peat bog vegetation, it often is difficult to move close enough to the water to collect exuvia.
  • Every metre of coastline is investigated for exuvia. However, only for the small ponds the entire coastline is investigated. Larger ponds are covered partially.
  • Also, now and then, the vegetation between 0 – about 5 m distance to the open water is investigated.
  • Exuvia are identified to species under a 40x stereo microscope using Brochard et al. (2012).
  • Aeshnidae are classified to male or female.
  • Exuvia are stored in pots per location (all years and dates mixed).
  • A selection of exuvia is used in a reference collection.
  • Observations are uploaded to Laij.fi (formerly Hatikka.fi)