A healthy male is brilliant lemon yellow, a color produced by carotenoid pigments in its diet.
Sunday, August 1, 2010
Yellow Stuff
Feeding my favorite bird: the American Goldfinch.
A healthy male is brilliant lemon yellow, a color produced by carotenoid pigments in its diet.
A healthy male is brilliant lemon yellow, a color produced by carotenoid pigments in its diet.
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