Birder's World - a comprehsive source of birding information for all ages.
Birdzilla.Com - Comprehesive site of wild bird information , articles, on-line life list and the Birdzilla.com Mall.
Bob Atkins - Nature and Wildlife Photographer
Don Baccus - Wildlife and bird photographer
Birding Hotspots Around the World - check this site before your next trip.
Don DesJardin - Ventura County based wildlife photorgrapher.
Johannes Nevala - Finnish bird illustrator living in Sweden (watercolor).
Nature Photography Forum - a large list of nature and wildlife photographers.