![](http://www.alamy.com/thumbs/6/B40A9D47-9BCB-47F0-9293-730DBB50FE10/2CNYEB0.jpg)
. Evolution of the colors of North American land birds . Agelaius tricolor c? A|elaius phceniceus (? A^elaius ^ubernator^ winter summer.
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Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectani, booksubjectbirds