IDENTIFICATION OF YELLOW-LEGGED GULLS - 6 -> the Caspian or Black Sea Herring Gull -

BY NORMAN DEANS VAN SWELM

(RE-EDITED 2011)

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chapters: /1-intro - /2-bodytext - /3-moult - /4-leg colour - colour of the orbital ring - long call - /5-the gull in the middle - /6-the Caspian or Black Sea Herring Gull -

/7-the Portuguese Gull - /8-the Atlantic Gull - /9-the Mediterranean Yellow-legged Gull - /10-pale morph of Larus fuscus - /11-discussion - acknowledgements - literature -

click pictures to enlarge!


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need to react? mail: Norman.vanswelm@wxs.nl