This list of birds of Saskatchewan includes all the bird species confirmed in the Canadian province of Saskatchewan as determined by Nature Saskatchewan. As of September 2017, there were 436 species on the Nature Saskatchewan checklist. Of these species, 86 are considered stragglers and 43 are hypothetical; both terms are defined below. Ten species have been introduced to Saskatchewan or elsewhere in North America. One species is extinct, two have been extirpated, and another might be extinct. 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 describe some categories of occurrence. (S) Straggler - species with 30 or fewer records per Nature Saskatchewan (H) Hypothetical - species lacking a specimen, photograph, or sound recording per Nature Saskatchewan; these also are "stragglers" but are not marked as such (I) Introduced - established solely as result of human intervention, either directly in Saskatchewan or elsewhere in North America Ducks, geese, and waterfowl Order: AnseriformesFamily: Anatidae The family Anatidae includes 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. Emperor goose, Anser canagica (H) Snow goose, Anser caerulescens Ross's goose, Anser rossii Greater white-fronted goose, Anser albifrons Tundra bean-goose, Anser serrirostris (S) Bar-headed goose, Anser indicus (H) (Not on the AOS Check-list) Brant, Branta bernicla (S) Barnacle goose, Branta leucopsis (H) Cackling goose, Branta hutchinsii Canada goose, Branta canadensis Mute swan, Cygnus olor (I) (Extirpated) Trumpeter swan, Cygnus buccinator Tundra swan, Cygnus columbianus Wood duck, Aix sponsa Garganey, Spatula querquedula (S) Blue-winged teal, Spatula discors Cinnamon teal, Spatula cyanoptera Northern shoveler, Spatula clypeata Gadwall, Mareca strepera Eurasian wigeon, Mareca penelope (S) American wigeon, Mareca americana Mallard, Anas fulvigula American black duck, Anas rubripes Northern pintail, Anas bahamensis Green-winged teal, Anas crecca Canvasback, Aythya valisineria Redhead, Aythya americana Common pochard, Aythya ferina (H) Ring-necked duck, Aythya collaris Tufted duck, Aythya fuligula (H) Greater scaup, Aythya marila Lesser