Californian Guillemot Bill

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“Bill averaging somewhat longer, about 1.90; culmen, commissure, and gonys nearly straight; upper mandible somewhat dilated toward the base along the cutting edges, and less feathered; gonydeal angle prominent. Bill consequently approaches that of the next species, in width and depth, but exaggerates the length and straightness of that of the last species.” Elliot Coues, 1884

Galleries

Bird Anatomy

Source

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

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