List of birds of South Dakota  This list of birds of South Dakota includes species documented in the U.S. state of South Dakota and accepted by the South Dakota Ornithologists' Union (SDOU). As of August 2017, 438 species were included in the official list. No additional species were recorded in eBird between that date and late July 2019. Of the 438, 85 are classed as accidental, 32 are classed as casual, six are hypothetical (see below), and eight have been introduced to North America. This list is presented in the taxonomic sequence of the "Check-list of North and Middle American Birds", 7th edition through the 60th Supplement, published by the American Ornithological Society (AOS). Common and scientific names are also those of the "Check-list". Unless otherwise noted, all species listed below are considered to occur regularly in South Dakota as permanent residents, summer or winter visitors, or migrants. These tags are used to annotate some species:   Order: AnseriformesFamily: Anatidae  The family 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. Forty-one species have been recorded in South Dakota. Order: GalliformesFamily: Odontophoridae  The New World quails are small, plump terrestrial birds only distantly related to the quails of the Old World, but named for their similar appearance and habits. One species has been recorded in South Dakota. Order: GalliformesFamily: Phasianidae  Phasianidae consists of the pheasants and their allies. These are terrestrial species, variable in size but generally plump with broad relatively short wings. Many species are gamebirds or have been domesticated as a food source for humans. Seven species have been recorded in South Dakota. Order: PodicipediformesFamily: Podicipedidae  Grebes are small to medium-large freshwater diving birds. They have lobed toes and are excellent swimmers and divers. However, they have their feet placed far back on the body, making them quite ungainly on land. Six species have been recorded in South Dakota. Order: ColumbiformesFamily: Columbidae  Pigeons and doves are stout-bodied birds with short necks and short slender bills with a fleshy cere.