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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Dark heterochromia in adult masked lapwings is universal, asymmetrical and possibly slightly sexually dimorphic (2022)
Auteurs :	Adam P. A. Cardilini, Auteur ; Daniel Lees, Auteur ; Dylan Roche, Auteur ; Peter Dann, Auteur ; Michael A. Weston, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (163(2) April, 2022)
Article en page(s) :	531-537
Langues:	Anglais
Résumé :	Variations in eye colour in birds are poorly documented. We measured and characterised eyes of 25 birds in the hand (16° × 22.5° segments per eye), using standardised and scaled images, and examined observations of 1 marked individual through time. We describe universal and extensive dark heterochromia (non-uniform colouration of the eye) in adult masked lapwings Vanellus miles novaehollandiae in our study population. Asymmetrical within-eye heterochromia has not previously been recorded for Charadridae, but in a review of images of eyes in the genus Vanellus, we found 45% of the 22 species had detectable heterochromia. There was a tendency (p = 0.051 after false discovery rate correction) for males to have slightly less black in the upper posterior part of the eye, a difference not distinguishable enough to aid sexing in the hand. We suggest standardised images of captured birds would underpin a more nuanced understanding of the occurrence of subtle heterochromia among birds, which may permit phylogenetic analyses directed at exploring possible evolution or function of such eye pigmentation.
En ligne :	https://doi.org/10.1007/s10336-021-01959-w

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