Javascript is not activated in your browser. This website needs javascript activated to work properly.

On the Exploitation of Mid-infrared Iridescence of Plumage for Remote Classification of Nocturnal Migrating Birds

  • Mikkel Brydegaard
  • Per Samuelsson
  • Michael W. Kudenov
  • Sune Svanberg
Publishing year: 2013
Language: English
Pages: 477-490
Publication/Series: Applied Spectroscopy
Volume: 67
Issue: 5
Document type: Journal article
Publisher: Society for Applied Spectroscopy

Abstract english

A challenging task in ornithology lies in identifying high-altitude nocturnal migrating bird species and genders. While the current approaches including radar, lunar obscuration, and single-band thermal imaging provide means of detection, a more detailed spectral or polarimetric analysis of light has the potential for retrieval of additional information whereby the species and sex could be determined. In this paper, we explore remote classification opportunities provided by iridescent features within feathers in the mid-infrared region. Our approach first involves characterizing the microstructural features of the feather by using rotation and straining, and a scheme for their remote detection is proposed by correlating these microstructural changes to spectral and polarimetric effects. Furthermore, we simulate the spectral signature of the entire bird by using a model that demonstrates how classification would be achieved. Finally, we apply infrared hyperspectral polarization imaging, showing that the net iridescent effect persists for the bird as a whole.


  • Atom and Molecular Physics and Optics
  • Remote sensing
  • Sensors
  • Lidar
  • Avian migration
  • Aerosol detection
  • Spectroscopy
  • Infrared
  • Sub-wavelength structures
  • nanostructures


  • ISSN: 1943-3530
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