The evolution of plumage colouration in parrots: a review
Mathew L. Berg A B and Andrew T. D. Bennett AA School of Life and Environmental Sciences, Deakin University, Pigdons Road, Geelong, Vic. 3217, Australia.
B Corresponding author. Email: mathew.berg@deakin.edu.au
Emu 110(1) 10-20 https://doi.org/10.1071/MU09076
Submitted: 19 August 2009 Accepted: 21 December 2009 Published: 18 February 2010
Abstract
The plumages of parrots provide some of the most striking colouration in nature. We summarise the diversity of mechanisms producing colour in parrots and the current evidence for the adaptive significance of variation in the colour of parrot plumages. Only recently have detailed studies begun to unravel the mechanisms of their colour-production and colour-vision systems. Parrots produce much of their plumage colouration through a unique suite of pigments (psittacofulvins), or through a feather tissue nanostructure that results in coherent scattering of light, or a combination of the two (producing green). Psittacofulvins are found nowhere else in nature, and may even generate fluorescence in many parrot species. Compared with other avian taxa, the adaptive significance of parrot plumage colouration remains poorly understood, although some studies suggest that plumage colouration may form important sexual signals and may be used in mate-choice by several species. There is evidence to suggest that parrot colouration can be subject to both environmental and genetic control. We emphasise that parrots offer a distinctive and useful colouration system for further study. Further research is required to unravel how the dramatic colour patterns of parrots evolved, and what roles colour signals may play in the life histories of parrots.
Acknowledgements
We thank Jim Bowmaker, Innes Cuthill, Jan Dyck, John Endler, Doris Gomez, Olle Håstad, Rob Heinsohn, David Hunt, Leo Joseph, Ben Knott, Elsie Krebs, Rob Magrath and Raoul Ribot for helpful discussions on parrots, and Richard Prum and Robert Porter for help with electron microscopy and Fourier analyses of feather nanostructure. We are also grateful to three anonymous reviewers for their valuable comments. This work was funded by Biological Sciences Research Council, the Leverhulme Trust and Deakin University.
Andersson, S. , and Amundsen, T. (1997). Ultraviolet colour vision and ornamentation in bluethroats. Proceedings of the Royal Society of London. Series B. Biological Sciences 264, 1587–1591.
| Crossref | GoogleScholarGoogle Scholar |
Bennett, A. T. D. , and Cuthill, I. C. (1994). Ultraviolet vision in birds: what is the function? Vision Research 34, 1471–1478.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Cuthill, I. C. , Bennett, A. T. D. , Partridge, J. C. , and Maier, E. J. (1999). Plumage reflectance and the objective assessment of avian sexual dichromatism. American Naturalist 153, 183–200.
| Crossref | GoogleScholarGoogle Scholar |
Dyck, J. (1971a). Structure and spectral reflectance of green and blue feathers of the lovebird (Agapornis roseicollis). Biologiske Skrifter 18, 1–67.
Galeotti, P. , Rubolini, D. , Dunn, P. O. , and Fasola, M. (2003). Colour polymorphism in birds: causes and functions. Journal of Evolutionary Biology 16, 635–646.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Hackett, S. J. , Kimball, R. T. , Reddy, S. , Bowie, R. C. K. , Braun, E. L. , Braun, M. J. , Chojnowski, J. L. , and Cox, W. A. , et al. (2008). A phylogenomic study of birds reveals their evolutionary history. Science 320, 1763–1768.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Hudon, J. , and Brush, A. H. (1992). Identification of carotenoid pigments in birds. Methods in Enzymology 213, 312–321.
| Crossref | GoogleScholarGoogle Scholar | CAS |
Kearvell, J. C. , Grant, A. D. , and Ming Boon, W. (2003). The orange-fronted parakeet (Cyanoramphus malherbi) is a distinct species: a review of recent research into its taxonomy and systematic relationship within the genus Cyanoramphus. Notornis 50, 27–35.
McGraw, K. J. , and Nogare, M. C. (2004). Carotenoid pigments and the selectivity of psittacofulvin-based coloration systems in parrots. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology 138, 229–233.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Mundy, N. I. , Badcock, N. S. , Hart, T. , Scribner, K. , Janssen, K. , and Nadeau, N. J. (2004). Conserved genetic basis of a quantitative plumage trait involved in mate choice. Science 303, 1870–1873.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Prum, R. O. , and Torres, R. H. (2003). A Fourier tool for the analysis of coherent light scattering by bio-optical nanostructures. Integrative and Comparative Biology 43, 591–602.
| Crossref | GoogleScholarGoogle Scholar |
Smith, G. A. (1975). Systematics of parrots. Ibis 117, 18–68.
| Crossref | GoogleScholarGoogle Scholar |
Stettenheim, P. R. (2000). The integumentary morphology of modern birds—an overview. American Zoologist 40, 461–477.
| Crossref | GoogleScholarGoogle Scholar |
Taylor, R. H. , Heatherbell, E. G. , and Heatherbell, E. M. (1986). The Orange-fronted Parakeet (Cyanoramphus malherbi) is a colour morph of the Yellow-crowned Parakeet (C. auriceps). Notornis 33, 17–22.
Wilkie, S. E. , Vissers, P. M. A. M. , Das, D. , De Grip, W. J. , Bowmaker, J. K. , and Hunt, D. M. (1998). 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). Biochemical Journal 330, 541–547.
| CAS | PubMed |
Wright, T. , Schirtzinger, E. E. , Matsumoto, T. , Eberhard, J. R. , Graves, G. R. , Sanchez, J. J. , Capelli, S. , and Müller, H. , et al. (2008). A multilocus molecular phylogeny of the parrots (Psittaciformes): support for a Gondwanan origin during the Cretaceous. Molecular Biology and Evolution 25, 2141–2156.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |
Zampiga, E. , Hoi, H. , and Pilastro, A. (2004). Preening, plumage reflectance and female choice in budgerigars. Ethology Ecology and Evolution 16, 339–349.