Laughing Gull Bill

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“Chroicocephalus atricilla. Laughing Gull. Black-headed Gull. Bill longer than middle toe and claw, shorter than tarsus or head, moderately compressed, rather stout for this genus. Culmen and commissure both decurved and the end, the latter somewhat sinuate at the base. Gonys considerably concave in front of the angle, somewhat so between the angle and tip; although the angle id well defined, the tip of the bill is so decurved that a chord from tip to base does not touch it.” Elliot Coues, 1884


Bird Anatomy


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


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