Black Guillemot Bill

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“Uria grylle. Black Guillemots. Bill much shorter than head, about equal to tarsus, straight, rather stout, moderately compressed; culmen at first straight, then decurved; gape straight to near tip; gonys short straight, ascending, about 1/2 as long as culmen. No nick or groove near tip of upper mandible; its tomial edge scarcely inflected. Nasal fossae large and deep, partially filled with feathers which do not entirely cover the nostrils.” Elliot Coues, 1884


Bird Anatomy


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


TIFF (full resolution)

2400×1347, 130.5 KiB

Large GIF

1024×574, 16.6 KiB

Medium GIF

640×359, 10.1 KiB

Small GIF

320×179, 4.6 KiB