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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References

SHOWING 1-10 OF 17 REFERENCES
Ultraviolet Vision in Birds
Visual pigments and colour vision in a nocturnal bird, Strix aluco (tawny owl)
The molecular basis for UV vision in birds: spectral characteristics, cDNA sequence and retinal localization of the UV-sensitive visual pigment of the budgerigar (Melopsittacus undulatus).
TLDR
This is the first UV opsin from an avian species to be sequenced and expressed in a heterologous system and yielded an absorption spectrum typical of a UV photopigment, with lambdamax 365+/-3 nm.
Ultraviolet vision, fluorescence and mate choice in a parrot, the budgerigar Melopsittacus undulatus
TLDR
This study provides convincing evidence that UV reflectances can play a role in mate choice in non–passerines, but no evidence that the yellow fluorescence observed under UVA illumination is itself important as a signal.
Is the ultraviolet waveband a special communication channel in avian mate choice?
TLDR
It is suggested to consider the role of the UV waveband in avian mate choice in conjunction with the rest of the avian visible spectrum because female zebra finches show the greatest response to the removal of longer wavelengths.
Ultraviolet signals in birds are special
TLDR
The results suggest that signals based on UV contrast are of special importance in the context of active sexual displays, and six hypotheses on why this may be the case are reviewed.
Ultraviolet vision in birds: What is its function?
Attraction of kestrels to vole scent marks visible in ultraviolet light
TLDR
It is suggested that kestrels flying over an area can see and use vole scent marks to assess vole numbers, a novel explanation for how raptors detect patches of high vole densities without prior knowledge of local food resources.
Ultraviolet sexual dimorphism and assortative mating in blue tits
TLDR
It is concluded that blue tits are markedly sex dimorphic in their own visual world, and that UV/violet coloration probably plays a role in blue tit mate acquisition.
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