Mersey Birders
Birding the North West
Gull Websites
Bahrain Gull Page
Bob Lewis's Gull Site
Delaware Valley Gull Page- North America
Glaucous-winged Gulls in Japan
Gull Identification of The Pacific Northwest
Gulls of West Coast North America
Hannu Koskinen Gull Site-Finnish
Identification of Caspian Gulls
Identification of Juvenile Yellow-legged Gull
Kentucky Ornithological Society-Discussion on Thayer's/Kumlien's Gulls
Korean Slaty Backed Gull Identification Page
Madrid Gull Team-in Spanish but nice photos
Reference guide to the Gulls of the Americas
Rudy Altenburg's Gull Website-Netherlands, Poland, NE Spain/France
Scandinavian Herring Gulls Wintering in Britain Paper