African Bird Club - http://www.africanbirdclub.org/
American Ornithologists' Union - http://www.aou.org/
Association of Field Ornithologists - http://www.afonet.org/index.html
Bermuda Audubon Society - http://www.audubon.bm/
BirdLife International - http://www.birdlife.net/
Birdnet - http://www.nmnh.si.edu/BIRDNET/
British Ornothologists' Union - http://www.bou.org.uk/
British Trust for Ornithology - http://www.bto.org/
Centro Italiano Studi Ornitologici - http://www.unipv.it/webbio/ciso/ciso.htm
Promotes ornithological activity and research in Italy.
Cooper Ornithological Society - http://www.cooper.org/
For persons interested in avian biology.
Cornell Laboratory of Ornithology - http://www.ornith.cornell.edu/
Details of the Labs various programs and resources, including the Library of Natural Sounds and Bioacoustics research programs, Collections and Publications.
Disabled Birders Association - http://www.disabledbirdersassociation.org.uk/
Promotes services and access to reserves and other birding areas so people with different needs can pursue the avocation of birding.
Dutch Birding Association - http://www.dutchbirding.nl/
Hong Kong Bird Watching Society - http://hkbws.org.hk/
International Ornithological Congress - http://www.ioc.org.cn/
Global scientific meeting of ornithologists, meeting every four years.
METU Birdwatching Society - http://www.metu.edu.tr/home/wwwokgt/
Aims to increase birdwatching in Turkey. Includes checklist, recent observation records, photos, links to other birding societies in Turkey.
National Audubon Society - http://www.audubon.org/
National Bird-Feeding Society - http://www.birdfeeding.org/
Non-profit dedicated to making bird feeding better for people and the birds.
Neotropical Bird Club - http://www.neotropicalbirdclub.org/
Niagra Peninsula Hawkwatch - http://www.freenet.hamilton.on.ca/link/niaghawk/index.html
Monitors annual spring migration of hawks, eagles, falcons and vultures.
Oriental Bird Club - http://www.orientalbirdclub.org/
Ornithological Society of the Middle East - http://www.osme.org/index.html
Collects, collates and publishes ornithological data on birds of the Middle East.
Pacific Seabird Group - http://www.pacificseabirdgroup.org/
Society of professional seabird researchers and managers dedicated to the study and conservation of seabirds.
Raptor Research Foundation - http://biology.boisestate.edu/raptor/
For persons interested in predatory birds.
Royal Australasian Ornithologists' Union - http://avoca.vicnet.net.au/~birdsaus/
Royal Society for the Protection of Birds - http://www.rspb.org.uk/
UK organization founded to conserve wild birds and the environment in which they live and breed.
Waterbird Society - http://www.nmnh.si.edu/BIRDNET/CWS/
International, scientific non-profit organization formed to establish better communication and coordination among those studying and monitoring aquatic birds.
Western Atlantic Shorebird Association - http://www.hopscotch.ca/shorebirds/
Promotes integration of shorebird research, monitoring and education efforts along the Western Atlantic flyway.
Wilson Ornithological Society - http://www.ummz.lsa.umich.edu/birds/wos.html
A world-wide organization of approximately 2500 people who share an interest in birds. Named after Alexander Wilson, Father of American Ornithology.
Zambian Ornithological Society - http://www.fisheagle.org/
For those interested in learning about and protecting Zambia's bird life.