Blue Grosbeak Bill

“Guiraca. Blue Grosbeak. Bill Commissure strongly angulated far beyond base, with deep under mandible and bristly rictus as in Zamelodia, but not so swollen, the culmen nearly straight. Wings long and pointed, folding about the middle of the tail; tip formed be the 2d-4th quills, 1st little shorter, 5th rapidly graduated. Tail shorter than wings, even. Tarsus rather less than middle toe and claw; outer lateral toe slightly longer than the inner, but scarcely reaching base of middle claw. One species, large, male blue, female brown.” Elliot Coues, 1884

Keywords

birds, ornithology, bird anatomy, bill, songbirds, North American birds, passerine birds, external parts of birds, large beaked birds, Guiraca, Blue Grosbeak, Passerina caerulea

Galleries

Bird Anatomy

Source

Elliot Coues Key to North American Birds (Boston, MA: Estes and Lauriat, 1884)

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