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A vision physiological estimation of ultraviolet window marking visibility to birds
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
2014 (English)In: PeerJ, ISSN 2167-8359, Vol. 2, e621- p.Article in journal (Refereed) Published
Abstract [en]

Billions of birds are estimated to be killed in window collisions every year, worldwide. A popular solution to this problem may lie in marking the glass with ultraviolet reflective or absorbing patterns, which the birds, but not humans, would see. Elegant as this remedy may seem at first glance, few of its proponents have taken into consideration how stark the contrasts between ultraviolet and human visible light reflections or transmissions must be to be visible to a bird under natural conditions. Complicating matters is that diurnal birds differ strongly in how their photoreceptors absorb ultraviolet and to a lesser degree blue light. We have used a physiological model of avian colour vision to estimate the chromatic contrasts of ultraviolet markings against a natural scene reflected and transmitted by ordinary window glass. Ultraviolets markings may be clearly visible under a range of lighting conditions, but only to birds with a UVS type of ultraviolet vision, such as many passerines. To bird species with the common VS type of vision, ultraviolet markings should only be visible if they produce almost perfect ultraviolet contrasts and are viewed against a scene with low chromatic variation but high ultraviolet content.

Place, publisher, year, edition, pages
2014. Vol. 2, e621- p.
Keyword [en]
Window collision, Colour vision, Ultraviolet light, Avian vision, Spectrophotometry, Visual physiology
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-245560DOI: 10.7717/peerj.621ISI: 000347623200004PubMedID: 25320684OAI: diva2:791395
Available from: 2015-02-27 Created: 2015-02-26 Last updated: 2015-02-27Bibliographically approved

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Ödeen, Anders
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