The pages of the IOC World Bird List are subdivided primarily by Order(s) and by sets of related families for Passeriformes. Please use the links below to get to the appropriate page, and then use the edit/find tool on your browser to locate a particular species on a page, as needed.
Separate pages (Family Index, Family Links) provide the current sequence of Orders and Families with links to the correct webpage. See also notes on the Family Classification of World Birds.
We Update the list every 3-4 months to accommodate advances in taxonomy and studies that unravel the relationships among world birds. Significant Updates are noted under “Comments”, which appear in a ‘balloon’ activated by the cursor. The comments include citations to published authorities detailed separately in References.