axanthic
lacking yellow pigmentation

Dictionary of ichthyology. 2009.

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  • Plumage — The differences in plumage of a Blue Grosbeak, from top to bottom, between a breeding male (alternate plumage) a non breeding male (basic plumage), a female and a related Indigo Bunting Plumage refers both to the layer of feathers that cover a… …   Wikipedia

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