• Alachua Audubon Society Florida
• American Bird Conservancy (ABC) a not-for-profit organization dedicated to the conservation of wild birds and their habitats in the Americas 
• Alaska Bird Observatory banding summaries & about the observatory
• American Birding Association North America's largest membership organization for active birders 
• American Federation of Aviculture (AFA) a nonprofit national organization established in 1974 to represent all aspects of aviculture and to educate the public about keeping and breedingbirds in captivity, its primary goals are the education and dissemination of information related to aviculture among pet owners, hobbyists, avicultural societies, zoos, veterinarians, research institutions, the pet industry, & government officials 
• American Ornithologists' Union
• Association of Avian Veterinarians (AAV) Advancing and Promoting Avian Medicine and Stewardship 
• Association of Field Ornithologists
• Australian Bird Study Association (ABSA) supports amateur and professional research on Australia's avian fauna 
• AVES asbl Societe d'etudes ornithologiques
• Avicultural Society of America founded in New York in October 1927 by several aviculturists who saw a need to share their experiences and knowledge about the keeping of birds in garden and aviaries 
• Bird Clubs are listed under Ornithology, Birding & Bird Clubs
• Big Bend Audubon Society Kearney, Nebraska 
• BirdLife Finland - Partner of BirdLife International
• BirdLife International a global conservation alliance with a worldwide network of Partners, Representatives, Associate Organisations, Specialist Groups and individuals, seeking to conserve all bird species on earth and their habitat and through this, it works for the world's biological diversity and the sustainability of human use of natural resources, founded in 1922 under its original name of the International Council for Bird Preservation (ICBP) 
• BirdLife International Partners partner organisations throughout the world and partners designate and representatives in the Americas 
• BirdLife South Africa exists to help the public understand and enjoy birds, dedicated to the study and protection of birds and their environments, and the mission of BirdLife International 
• Birds Australia RAOU formerly Virtual Emu, the Royal Australasian Ornithologists Union
• British Ornithologists Union (BOU) aims to encourage the study of birds in Britain, Europe and throughout the world, in order to understand their biology and to aid their conservation 
• British Trust for Ornithology (BTO) has been gathering detailed information on Britain's and Ireland's birds for over 60 years, mainly through the activities of it's members 
• Canadian Peregrine Foundation
• CAUZ Members with an Interest in Birds list arranged by taxonomic interest groupings
• CEMAVE Centro de Pesquisas para Conservacao das Aves Silvestres Brasilian research centre for conservation of wild birds
• Centro Italiano Studi Ornitologici (CISO) a cultural, non political, non profit association for promotion of ornithological activity and research in Italy, working in connection with university institutes and departments, natural history and science museums, recognized ornithological associations and non professional ornithologists 
• Colorado Bird Observatory mission to conserve Rocky Mountain and Great Plains birds through research and public education 
• Colorado Field Ornithologists promotes field study, conservation, and enjoyment of Colorado birds, review sightings of rare birds, maintains the authoritative list of Colorado birds and publishes the Journal of the Colorado Field Ornithologists 
• Cooper Ornithological Society California
• Copenhagen Bird Ringing Centre Zoological Museum University of Copenhagen (ZMUC)
• Cornell Lab of Ornithology international center and membership organisation for the study, appreciation and conservation of birds
• Delta Marsh Bird Observatory Manitoba
• Edward Grey Institute of Field Ornithology (EGI) a sub-department of the University of Oxford Zoology Department, founded in 1936 in memory of the former Chancellor, Earl Grey of Fallodon, the Institute houses the Alexander Library, the best ornithological library in Europe and one of the best in the world 
• Estonian Ornithological Society (EOS) Eesti Ornitoloogiaühing, founded in 1921, aims to determine all bird species in Estonia, protect birds, study bird behaviour and migration, and to propagate this knowledge among the population 
• Fair Isle Bird Observatory on Britain’s most remote inhabited island, Shetland, UK 
• Falsterbo Bird Observatory, Fyren, Sweden
• Federacos Ornitofilicas Brasileiras
• Florida Audubon Society the statewide voice of conservation, promoting the protection, preservation, and restoration of birds, all wildlife, and their habitat through science based advocacy and education 
• George M. Sutton Avian Research Center a private, non-profit organization affiliated with the University of Oklahoma's Oklahoma Biological Survey, finding cooperative conservation solutions for birds and the natural world through science and education 
• Göteborgs Ornitologiska Förening (GOF)
• Hagen Avicultural Research Institute (HARI) captive breeding & maintenance of companion birds
• Hellenic Ornithological Society (HOS) the only non-governmental organization in Greece that deals exclusively with the protection of wild birds and their habitats, a non-profit society established in 1982 
• Houston Audubon Society Houston, Texas 
• Illinois Ornithological Society (IOS) dedicated to promoting an increased awareness of birds in Illinois 
• Inland Bird Banding Asociation (IBBA) an organization for all interested in the serious study of birds, their conservation, and ecology 
• International Aviculturists Society avian research, conservation and educational programs for companion bird owners
• Jerusalem Bird Observatory (JBO) designed for environmental education and conservation research 
• Kent Ornithological Society (KOS) birds & birdwatching in kent, UK
• Laboratory of Ornithology and Herpetology Zoological Institute St Petersburg
• Lega Italiana Protezione Uccelli (LIPU) Italian association for nature conservation 
• Malawi Ornithological Society
• Maryland Ornithological Society
• Medmaravis the Mediterranean Marine Bird Association founded in 1984 has become the leading seabird research organisation in the Mediterranean 
• Migratory Bird Conservancy (MBC) partnership among birders, businesses, and the conservation community established to facilitate public contributions to the goals and objectives of Partners in Flight 
• Minnesota Ornithologists' Union
• Museums are listed under Museums & Collections
• National Audubon Society
• National Avian Research Center (NARC) Abu Dhabi, promoting ecologically sustainable utilization of the houbara bustard and saker falcon
• Neotropical Bird Club
• New Jersey Audubon Society including index of ornithological links
• North American Banding Council (NABC) non-profit group representing organizations whose members utilize bird banding as a tool, promoting sound and ethical banding principles and techniques 
• Oriental Bird Club UK registered charity established for ornithologists throughout the world, both amateur and professional, who share a common interest in the region's birds and their conservation 
• Ornithological Council informational organization founded by seven North American professional ornithological societies
• Ornithological Societies of North America (OSNA) founded in 1979 as the joint membership and billing service of AOU, AFO, CWS, COS, RRF and WOS 
• Ornithological Society of the Middle East (OSME) formed in April 1978 as a successor to the Ornithological Society of Turkey 
• Pacific Seabird Group (PSG) a society of professional seabird researchers and managers dedicated to the study and conservation of seabirds, formed in 1972 out of a need for increased communication among academic and government seabird researchers 
• Percy FitzPatrick Institute of African Ornithology an autonomous research and postgraduate teaching unit affiliated to the Zoology department at the University of Cape Town, South Africa 
• Point Reyes Bird Observatory (PRBO) California, a non-profit, membership organization founded in 1965 to conserve birds and the environment using science to understand and find solutions to problems threatening wildlife populations and ecosystems 
• Purple Martin Society US not-for-profit organization whose goals are to preserve the species and advance interest and knowledge of Purple Martins 
• Raptor Research Foundation
• Rio Grande Valley Bird Observatory birds & birding in South Texas
• Royal Society for the Protection of Birds (RSPB) UK organization which exists to conserve wild birds and the environment in which they live and leads action for bird conservation 
• San Francisco Bay Bird Observatory (SFBBO) a not-for-profit research organization dedicated to advancing knowledge of birds and their habitats through original research, monitoring, and educational activities, information is provided to governmental agencies, industry, and the public to support informed natural resource management decisions for the San Francisco Bay area 
• Santa Cruz Predatory Bird Research Group (SCPBRG) Long Marine Lab, University of California, Santa Cruz, formed in 1975 to restore endangered peregrine falcon andf other species in California, a resource to agency biologists, industry, and university researchers 
• Skanes Ornitologiska Foerening (SkOF) Scanian Ornithological Society (SkOF) is a regional chapter of the Swedish Ornithological Society (SOF) 
• Seabird Bycatch Working Group Institute for Fisheries Resources
• Society of Canadian Ornithologists
• Sociedade Brasileira de Ornitologia (SBO) founded in 1984, its mission is to promote the scientific study and conservation of Brazilian birds
• Society of Caribbean Ornithology
• Suncoast Seabird Sanctuary Tampa Bay Florida
• Tennessee Ornithological Society
• Texas Ornithological Society
• Threatened Waterfowl Specialist Group (TWSG) established in 1990 and coordinated by The Wildfowl & Wetlands Trust (WWT), as part of the specialist group network of Wetlands International (formerly IWRB), and the IUCN Species Survival Commission 
• UC Davis Center for Avian Biology multidisciplinary campus research unit with links to numerous avian sites on and off campus 
• University of Minnesota Avian Research Center
• Utsira Bird Observatory island with the most first recordings in Norway 
• Washington Ornithological Society (WOS)
• Waterbird Society formerly The Colonial Waterbird Society 
• Welsh Ornithological Society (WOS) information on the society, sites of interest, contact information 
• Western Field Ornithologists (WFO) an organization committed to field-oriented descriptive ornithology, with appeal for both amateur and professional, region of interest - the Rocky Mountain and Pacific states and provinces, including Alaska and Hawai'i, western Texas, northwestern Mexico, and the northeastern Pacific Ocean
• Wildfowl & Wetlands Trust (WWT) UK conservation body founded in 1946 at Slimbridge, Gloucestershire, by the late Sir Peter Scott 
• Wilson Ornithological Society
• York Ornithological Club Birdwatching in York & North Yorkshire 

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Scricciolo: Agenda Ornitologica