117. LOON. 33 in.
(Gavia imber. 7.)
Black, showing greenish on head and neck, spotted with square or oval patches of white on back and wings and striped with white in front of wings; white below; two conspicuous white-striped bars across the black neck give the effect of a broad black collar; tail, very short; eye, red; large black bill, long and pointed; dives and sinks like the [Grebes]; note, an eerie, prolonged cry.
118. AMERICAN HERRING GULL. 24 in.
(Larus argentatus smithsonianus. 51a.)
White; wings and back, pearly blue-gray; bill yellow, showing a small vermillion spot on either side; the longest wing feathers are partly black, marked and tipped with white; the closed wing therefore shows black towards the end, marked with a regular line of white spots and tipped with white at the extreme point; eyelids, bright yellow; looks large and heavy in flight. Winter Plumage: Streaked on head and neck with gray. Immature Plumage: Dark and much streaked with brownish; bill darker. [Ring-billed Gull.]
119. RING-BILLED GULL. 19 in.
(Larus delawarensis. 54.)
Similar to the American Herring Gull, but smaller; bill, greenish-yellow, bright at tip, banded with black around the middle; wing tipped at extreme point with black; feet greenish-yellow; eyelids vermillion-red. [American Herring Gull.]