A Reference Guide to Gulls of the Americas
This ambitious volume covers the 36 species of gulls that occur in North and South America, with detailed information to help you identify these fascinating but challenging birds in their many and varied plumages. With 1,160 carefully chosen color photographs, this new reference guide, written by two of North America's top gull experts, is the definitive new work on gulls of the Americas.
Peterson Reference Guides offer authoritative, comprehensive information, including detailed text, maps, and superior illustrations. Written by expert authors, the guides are an unparalleled resource for understanding specific groups of animals.
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Grayhooded Gull Larus cirrocephalus 25b European Herring Gull L a argentatus
Redlegged Kittiwake Rissa brevirostris 33 Glaucouswinged Gull Larus glaucescens
PRIMITIVE WHITEHEADED GULLS H5 Thayers Gull x KumliensIceland Gull
SMALL WHITEHEADED GULLS Gull H10 Glaucous Gull x Great Blackbacked Gull
adult ADULT NONBREEDING Alaska AMERICAN HERRING GULL averages base basic bill birds blackish bleached breeding broad brown brownish California casual Coast common compare with photo Complete contrasting coverts cycle dark dark brown darker differences distal distinct Distinguished dusky extensive eyes fairly feathers FIRST-CYCLE flesh pink flight GLAUCOUS-WINGED GULL gray upperparts head head and neck hood HYBRID IDENTIFICATION individual inner primaries Kodak Kumlien's lack Lakes larger late legs less mainly markings medium mirror molt mottling narrow Note orbital ring outer primaries overall pale gray paler panel pattern PB molt plumage PRESUMED produces range rarely relatively scapulars SECOND-CYCLE secondaries shape similar slaty gray slightly smaller species Steve N. G. Howell streaking structure subterminal tail tertials THAYER'S GULL third THIRD-CYCLE tips typically underparts upperparts upperwing coverts usually variable Western Gull white tips whitish wing wingtips winter yellow