Siberian Goldfinch – Brown

Description:

The brown mutation is sex-linked and recessive. As with the agate mutation, it was first established in the common goldfinch (Carduelis carduelis carduelis) and subsequently in the Siberian goldfinch (Carduelis carduelis major).
The brown mutation is very often the first mutation to appear in a species or subspecies. It involves the transformation of black eumelanin into brown. The bird exhibits a predominantly brown plumage.

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