This is a list of bird species confirmed in the Canadian province of New Brunswick. The New Brunswick Bird Records Committee (NBBRC) Checklist of New Brunswick Birds contained 438 species as of 2021. Of them, 91 are accidental and 49 are rare as defined below. Eight were introduced to North America, four are extinct, and one has been extirpated. This list is presented in the taxonomic sequence of the Check-list of North and Middle American Birds, 7th edition through the 62nd Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the Check-list, except that Canadian English spellings are used and the common names of families are from the Clements taxonomy because the AOS list does not include them. The following tags are used to categorise some species: (A) Accidental - "Accidental (records in no more than 5 years of 50)" per the NBBRC (R) Rare - "Very rare (not expected annually)" per the NBBRC (O) Origin debatable - a species whose origin is unknown (I) Introduced - a species introduced to North America by humans Ducks, geese, and waterfowl Order: AnseriformesFamily: Anatidae Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, bills which are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils. Black-bellied whistling-duck, Dendrocygna autumnalis (A) Fulvous whistling-duck, Dendrocygna bicolor (A) Snow goose, Anser caerulescens Ross's goose, Anser rossii (A) (O) Graylag goose, Anser anser (A) Greater white-fronted goose, Anser albifrons (R) Pink-footed goose, Anser brachyrhynchus (A) Brant, Branta bernicla Barnacle goose, Branta leucopsis (A) Cackling goose, Branta hutchinsii (A) Canada goose, Branta canadensis Barnacle goose, Branta leucopsis (A) (O) Mute swan, Cygnus olor (I) (A) Tundra swan, Cygnus columbianus (R) Common shelduck, Tadorna tadorna (A) Wood duck, Aix sponsa Garganey, Spatula querquedula (A) (O) Blue-winged teal, Spatula discors Cinnamon teal, Spatula cyanoptera (A) (O) Northern shoveler, Spatula clypeata Gadwall, Mareca strepera Eurasian wigeon, Mareca penelope American wigeon, Mareca americana Mallard, Anas platyrhynchos American black duck, Anas rubripes Northern pintail, Anas acuta Green-winged teal, Anas crecca Canvasback, Aythya valisineria (R) Redhead, Aythya americana Ring-necked duck, Aythya collaris Tufted duck, Aythya fuligula (R) Greater scaup, Aythya marila Lesser scaup, Aythya affinis King eider, Somateria spectabilis Common eider, Somateria mollissima Harlequin duck, Histrionicus histrionicus Labrador duck, Camptorhynchus labradorius