Bird links:

Avibase - The World Bird Database

The RSPB Bird Identifier - the most common garden birds in the UK

Dictionary of Birdwatching Terminology

Birds of Britain - The Web Magazine for Birdwatchers

British Garden Birds

The British Trust for Ornithology

10,000 Birds "...birding,blogging, conservation, commentary and so much more." Excellent site!

Fatbirder 

Bird Cinema - Video for Bird Watchers

Minnesota Birds

Minnesota Dept of Natural Resources - birds

Ornithology - the Science of Birds

The Royal Society for the Protection of Birds

Surfbirds - The World Birding Website

Stephen Burch's Birding Website - birding in Oxfordshire, the UK and overseas

Ten Tips for New Bird Watchers

Birding Basics

A Pocketful of Birds: BNA's Illustrated Guide to Common Garden Birds

Internet Bird Collection (IBC) - a FREE online audiovisual library of footage of the world's birds!

Scientific Bird Names Explained

Pronunciation of English Bird Names

Shops:

CJ WildBird Foods

Ernest Charles - the only bird care range endorsed by The British Trust for Ornithology

The Really Wild Bird Food Company - wild bird food produced locally on a UK farm

The Nest Box Company

The Bird Table

Sparrow & Finch