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Welcome to the BirdForum Opus
The interactive birding encyclopaedia

Welcome to the Opus, an interactive, multimedia encyclopaedia that anyone can edit. You can use the Opus to find out about everything to do with birds - from the birds themselves to the places you can find them.

Featured Article: Lesser Black-backed Gull
Photo © by Andy Bright


A common and widespread gull in the north of the region. Breeds in Greenland, Iceland, the Faroes and British Isles, in Portugal and north-west Spain and from Brittany to Denmark, coastal Norway and Sweden, inland in Finland and north-west Russia and also on the coast of northern Russia.


In winter these birds can be found amongst mixed species gull flocks both on the coast and inland, often frequenting landfill sites. On passage these birds can occur anywhere.

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