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• American Ornithologists' Union - Organization devoted to the scientific study of birds. Offers checklist of North American birds and membership data.
• Association of Field Ornithologists - Society of professional and amateur researchers. Journal of field ornithology, organizational data and literature citations.
• Bird Studies Canada - Produces a quarterly journal, BirdWatch Canada, and is dedicated to advancing the understanding, appreciation and conservation of wild birds and their habitats.
• Cooper Ornithological Society - Organization whose goal is to advance the scientific study of birds and their habitats and support their conservation.
• Latvian Ornithological Society - This organization's aim is to maintain conditions ensuring sustainable existence of all bird species in Latvia.
• Neotropical Ornithological Society - Information about the society and its journal, Ornitologia Neotropical.
• The Ornithological Sociaty of Japan - Produces two publications, Ornithological Science which includes research and original articles, and the Japanese Journal of Ornithology. Abstracts from back numbers are available on-line free of charge.
• Pacific Seabird Group (PSG) - This organisation is dedicated to the study of Pacific seabirds and their environment.
• Society for the Conservation and Study of Caribbean Birds - SCSCB promotes the scientific study and conservation of Caribbean birds and their habitats. It hosts biennial meetings and is active through working groups and projects.
• Society of Canadian Ornithologists | Société des Ornithologistes du Canada - This society has an annual meeting, makes awards, produces a journal and interconnects with other worldwide ornithological societies.
• The Waterbird Society - This society is composed of biologists, researchers, conservationists, students, and others interested in the behavior, ecology, and conservation of waterbirds.
• Western Field Ornithologists - Committed to field-oriented descriptive ornithology. Includes Western Birds table of contents, meetings and events.