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Confirm House Finch

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I'm about 95% sure on this house finch. I've always seen them redder. Maybe the time of year.

Grants Pass Or

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Yep, male House Finch.  The amount of color varies based on the amount of a protein in their food at the time they grow new feathers.  The more of the protein, the more color will be in their feathers.  The feathers will stay that way until the next time they molt and grow new ones.

So sometimes they're a darker red, a lighter red, orange, or even yellow!

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36 minutes ago, Charlie Spencer said:

Yep, male House Finch.  The amount of color varies based on the amount of a protein in their food at the time they grow new feathers.  The more of the protein, the more color will be in their feathers.  The feathers will stay that way until the next time they molt and grow new ones.

So sometimes they're a darker red, a lighter red, orange, or even yellow!

It's actually not a protein but a carotenoid, or three different carotenoids with different colors.  If you want to get technical.

https://www.10000birds.com/whats-up-with-this-house-finch.htm

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Darn straight.  It was a long day and every time I try to spell that word, I wind up with cardiac or cartenoid or carnoid or carrotoid.  I think they're structured more like fats than proteins.

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