Bird Protection & Science
Royal Society for the Protection of Birds (RSPB)
UK based established for the protection of birds. Conservation projects through Conservation Science.
British Trust for Ornithology (BTO)
UK based established for scientific research.
Audubon Society (National Audubon Society)
United States based for the protection of birds and conservation.
The Cornell Lab of Ornithology
United States dedicated to scientific research.
American Birding Association (ABA)
Dedicated to the recreational birding in Canada and the United States.
American Ornithological Society (AOU)
Checklist of North and Middle American Birds.