Viewing geometry affects sexual dichromatism and conspicuousness of noniridescent plumage of Swallow Tanagers (Tersina viridis)

@article{Barreira2016ViewingGA,
  title={Viewing geometry affects sexual dichromatism and conspicuousness of noniridescent plumage of Swallow Tanagers (Tersina viridis)},
  author={Ana S. Barreira and Natalia C. Garc{\'i}a and Stephen C. Lougheed and Pablo L. Tubaro},
  journal={The Auk},
  year={2016},
  volume={133},
  pages={530 - 543}
}
ABSTRACT Some types of plumage color are difficult to characterize spectrophotometrically because the properties of the reflected light change with viewing geometry (i.e. the relative positions of the light source and the observer, and the orientation of the feather). This is the case for the noniridescent plumage coloration of the Swallow Tanager (Tersina viridis), which seems to change from a human perspective as the angle between the light source and the observer varies. In this study, we… 
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