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"Astragalinus mexicanus. Mexican Goldfinch. The upper parts continuously-black, and the black of the crown extending below the eyes, enclosing the olive under eyelid. Mexican border and southward. This bird looks quite unlike typical psaltria, but the gradation through var. arizonae is perfect; and mexicana, moreover, leads directly into var. columbiana, a Central American form in which the tail-spots are very small or wanting. The females of these several varieties cannot by distinguished with certainty." Elliot Coues, 1884

Mexican Goldfinch

"Astragalinus mexicanus. Mexican Goldfinch. The upper parts continuously-black, and the black of the…