European Greenfinch – Grey Wing

Description:

Phenotypically, the Grey-wing mutation in the European Greenfinch (Carduelis chloris) is comparable to the fixed Grey-wing mutation in the canary. An irregular dilution of eumelanin is observed, which is particularly striking in young birds. The Pastel dilution factor present in the Grey Wing is very visible on the flight feathers and tail feathers. In fact, it is the tips of the feathers that are pigmented, and the combination of the Pastel factor with the Grey Wing factor can result in a very marked dilution of the flight feathers and tail feathers, with the exception of the tips, or vice versa. The inheritance of the Grey Wing factor is currently being studied, and given the test matings I have carried out this season, I think I will be able to provide you with more information in a few months’ time. I am eagerly awaiting the moult of my young birds. Depending on the matings carried out, and the colour and sex of the young birds produced, our understanding of the Grey Wing mutation should improve.

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