Morphological Variation among Herring Gulls (Larus argentatus) and Great Black-backed Gulls (Larus marinus) in Eastern North America Gregory J. Robertson, Sheena Roul, Karel A. Allard, Cynthia Pekarik ...
View 331 AUDUBON, John James. Black Backed Gull Plate CCXLI, Larus marinus. Engraving with etching, aquatint and hand-coloring by Robert Havell, circa 1835, on J Whatman Turkey Mill paper dated 1834, ...
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