This is a list of bird species confirmed in Canada. Unless otherwise noted, the list is that of Bird Checklists of the World as of July 2022. Of the 703 species listed here, 235 are accidental. Twelve species were introduced to North America or directly to Canada, three species are extinct, and three (possibly four) have been extirpated. One species of uncertain origin is also included. This list is presented in the taxonomic sequence of the Check-list of North and Middle American Birds, 7th edition through the 63rd Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the Check-list, except that the common names of families are from the Clements taxonomy because the AOS list does not include them. Canadian birds most closely resemble those of Eurasia, which was connected to the continent as part of the supercontinent Laurasia until around 60 million years ago. Many families which occur in Canada are also found throughout the Northern Hemisphere or worldwide. However, some families are unique to the New World; those represented in this list are the hummingbirds, the New World vultures, the New World quail, the tyrant flycatchers, the mimids, the wood-warblers, the cardinals, and the icterids. Three species on the list (Ross's goose, whooping crane, and Harris's sparrow) breed only in Canada. The extinct Labrador duck is also believed to have been a breeding endemic, though its breeding areas are not known. Unless otherwise noted, all species listed below are considered to occur regularly in Canada as permanent residents, summer or winter visitors, or migrants. These tags are used to annotate some species: (A) Accidental - a species that rarely or accidentally occurs in Canada (I) Introduced - a species introduced to Canada as a consequence, direct or indirect, of human actions (E) Extinct - a recent species which no longer exists (Ex) Extirpated - a species which no longer occurs in Canada but exists elsewhere Population status symbols are those of the Red List published by the International Union for Conservation of Nature (IUCN). The symbols apply to the species' worldwide status, not their status solely in Canada. The symbols and their meanings, in increasing order of peril, are: = least concern = near threatened = vulnerable = endangered = critically endangered = extinct in the wild = extinct Ducks, geese, and waterfowl Order: AnseriformesFamily: Anatidae The family Anatidae includes the