A History of North American Birds; Land Birds; Vol. 2 of 3 - Spencer Fullerton Baird; T. M. Brewer; Robert Ridgway - Page №165

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3. Agelaius phœniceus. ♂ shoulder.

4. Agelaius gubernator. ♂ shoulder.

5. Agelaius tricolor. ♂ shoulder.