Use of Ultraviolet Light as an Aid in Age Classification of Owls

@inproceedings{Weidensaul2011UseOU,
  title={Use of Ultraviolet Light as an Aid in Age Classification of Owls},
  author={C. Scott Weidensaul and Bruce A. Colvin and David F. Brinker and J. Steven Huy},
  year={2011}
}
Abstract Use of ultraviolet (UV) light, which causes porphyrin pigments in feathers of some birds to fluoresce, provides a simple, effective means of distinguishing multiple generations of flight feathers in owls. This permits easier and more accurate classification of age of adult owls. This lighting technique has been used extensively with Barn Owls (Tyto alba) and Northern Saw-whet Owls (Aegolius acadicus) and works well on a variety of owl species at night in the field, and should have wide… 

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