A Field Guide to Birds on the Web:  A useful site for linking to bird pictures, indexed in taxonomic order.
http://fieldguide.tripod.com/sci_ndex.html

Comprehensive Bird Website Links and Searchable Databases
http://aves.net/the-owl/blnkbird.htm

Birdingpal.com is the international site that brings together birders using instant on-line access.
http://www.birdingpal.com/

Alan Wilkinson's Internet Flyway:  where to find the birds - and birders - worldwide.
http://www.orientalbirdclub.org/flyway/

Dennis Lepage's Birdlinks to the World
http://www.ntic.qc.ca/~nellus/links.html#index

Chris Bradshaw's Website for North Kent Birding is
http://www.northkentbirding.freeserve.co.uk/index.html