A fantastic website about seabirds.

Seabirds, Forage Fish, and Marine Ecosystems
Nice pictures!

A good source for seabird information.

Another interesting site about seabirds and marine ornithology

Rudy's Gull site: many good pictures and links to other sites about gulls.
 

Pelagic birding on the US West coast.

Brian Patteson's site about pelagic birding: worth a visit
 

A nice site for who wants to watch seabirds on the Atlantic islands: Madeira, Selvagens, Azores and also Senegal

Fat birder: Anything you want to know about ornithology:
many fine birdwatching links.