--Swedish--
Truthjälpen - Fantastiskt bra bestämningssida

--English--
Jörgen Bernsmo - Gulls from Sweden

Hans Larsson - Gulls from all over the world

Ies Meulmeester - Really great Dutch gull site

Gulls in Amsterdam - Gulls from Europe

Blog Larus fuscus - Frequently updated gull blog

Martin Reid - American gulls

Stéphane Aubry - Gulls seen in Europe

North Thames Gull Group - Great gull ringing site