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Investigation of atmospheric insect wing-beat frequencies and iridescence features using a multispectral kHz remote detection system

  • Alem Gebru
  • Erich Rohwer
  • Pieter Neethling
  • Mikkel Brydegaard
Publishing year: 2014
Language: English
Publication/Series: Journal of Applied Remote Sensing
Volume: 8
Document type: Journal article
Publisher: SPIE

Abstract english

Quantitative investigation of insect activity in their natural habitat is a challenging task for entomologists. It is difficult to address questions such as flight direction, predation strength, and overall activities using the current techniques such as traps and sweep nets. A multispectral kHz remote detection system using sunlight as an illumination source is presented. We explore the possibilities of remote optical classification of insects based on their wing-beat frequencies and iridescence features. It is shown that the wing-beat frequency of the fast insect events can be resolved by implementing high-sampling frequency. The iridescence features generated from the change of color in two channels (visible and near-infrared) during wing-beat cycle are presented. We show that the shape of the wing-beat trajectory is different for different insects. The flight direction of an atmospheric insect is also determined using a silicon quadrant detector. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)


  • Atom and Molecular Physics and Optics
  • stand-off detection
  • remote dark-field detection
  • iridescence
  • optical
  • cross-section
  • wing-beat frequency
  • quadrant detection
  • multiband
  • scattering


  • ISSN: 1931-3195
Mikkel Brygdegaard
E-mail: mikkel [dot] brydegaard [at] forbrf [dot] lth [dot] se

Associate senior lecturer

Combustion Physics

+46 46 222 76 57



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