Society of Canadian Ornithologists was created in 1983.
Scottish Ornithologists' Club was created in 1936.
Canberra Ornithologists Group was created in 1970.
Association of Field Ornithologists was created in 1922.
Adelaide Ornithologists Club was created in 1960.
American Ornithologists' Union was created in 1883.
Canadian Nuclear Society was created in 1970.
Canadian Paediatric Society was created in 1922.
Canadian Cancer Society was created in 1938.
Canadian Identification Society was created in 1977.
Royal Australasian Ornithologists Union was created in 1901.
NSW Field Ornithologists Club was created in 1970.
Canadian Society of Respiratory Therapists was created in 1964.