Sunday, March 5, 2017

American Goldfinch

I banded a goldfinch on Friday. I have ringed very few birds this year. This goldfinch shows a hint of spring to come—note the black crown splotches. More interesting are this bird’s bright yellow shoulders. Goldfinches take two years to acquire this color. Second-year birds sport dusky shoulders. This bird, then, is aged ASY—After Second Year. See also my 2010 post on aging and sexing goldfinches.

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