caa a22 4500 463175220 CHVBK 20180406164824.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10336-007-0131-7 doi (NATIONALLICENCE)springer-10.1007/s10336-007-0131-7 Comparison of multiple-angle spectrometry of plumage versus individual feathers for the assessment of sexual dichromatism in the long-tailed finch ( Poephila acuticauda ) [Elektronische Daten] [S. Santos, J. Lumeij] Reflectance spectrometry of avian plumage colour is a commonly used technique in ecological, behavioural and taxonomical studies. This method enables visualization of different characteristics in the ultraviolet part of the spectrum. Different research groups currently active in this field use diverse set-ups to assess avian colouration and compare results - without taking methodological differences into consideration. In this reflectometric study, we show significant differences between colour assessment results obtained with three different incidence and observation angle geometries (45°/45°, 45°/90° and 90°/90°) used for the sexual colour characterization of the long-tailed finch (Poephila acuticauda) feather coat. Furthermore, we show that results obtained from measuring the plumage and individual feathers lead to different conclusions. Both plumage and individual feathers revealed sexual dichromatism but, occasionally, at different angle geometries. This study shows how some plumage characteristics may be overviewed if single unidirectional reflectance spectrometry is used. Dt. Ornithologen-Gesellschaft e.V., 2007 Colour dimorphism nationallicence Feather structure nationallicence Incidence and observation angles nationallicence Reflectance spectrometry nationallicence Santos S. ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860, Castelldefels, Barcelona, Spain aut Lumeij J. Division of Avian and Exotic Animal Medicine, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Universiteit Utrecht, Yalelaan 108, 3584 CM, Utrecht, The Netherlands aut Journal of Ornithology Springer-Verlag 148/3(2007-07-01), 281-291 0021-8375 148:3<281 2007 148 10336 https://doi.org/10.1007/s10336-007-0131-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10336-007-0131-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Santos S. ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860, Castelldefels, Barcelona, Spain aut NATIONALLICENCE 700 1- Lumeij J. Division of Avian and Exotic Animal Medicine, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Universiteit Utrecht, Yalelaan 108, 3584 CM, Utrecht, The Netherlands aut NATIONALLICENCE 773 0- Journal of Ornithology Springer-Verlag 148/3(2007-07-01), 281-291 0021-8375 148:3<281 2007 148 10336 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer