La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Aberrant plumage colour in a Savi's Warbler Locustella luscinioides (2016)
Auteurs :	Matthieu Marquet, Auteur ; Emmanuel Sechet, Auteur
Type de document :	Article
Dans :	Alauda (84(2) 2016)
Article en page(s) :	145-150
Résumé :	On 10 August 2013, a Savi's Warbler Locustella luscinioides with aberrant plumage colour was caught and ringed in the Briere marshland (western France). The whole plumage, usually brown reddish, was very pale brown; the naked parts (bill and legs) were also paler than usual. The aberrations of colour plumage of wild birds resulting from genetic mutations are varied and quite well-known. However, the naming of colour aberrations may still cause confusion now and again. According to the terminology established by van GROUW (2013), the colour aberration is due to the 'brown' mutation, transmitted hereditarily by a recessive and sex linked allele. This mutation produces a reduction of eumelanin causing an overall paleness in the plumage and the naked parts (van GROUW, 2006, 2013). This observation is the first record of 'brown' mutation that we have discovered in Savi's Warbler, although several cases of pale plumages due to mutations among Acrocephalidae warblers were known beforehand.

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