60 birds were recorded seen in South Dakota in September in our iNaturalist sample; 2 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September

Western Meadowlark

Mountain Bluebird

Turkey Vulture

Wild Turkey

American Robin

Northern Flicker

Great Blue Heron

Red-tailed Hawk
Black-billed Magpie

Bald Eagle

Mourning Dove

Rock Wren
All birds seen in South Dakota in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Western Meadowlark | Sturnella neglecta | New World Blackbirds and Orioles | 95 | Jul (past peak) |
| 2 | Mountain Bluebird | Sialia currucoides | Thrushes | 90 | Jul (past peak) |
| 3 | Turkey Vulture | Cathartes aura | New World Vultures | 82 | Jul (past peak) |
| 4 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 74 | May (past peak) |
| 5 | American Robin | Turdus migratorius | Thrushes | 73 | Jun (past peak) |
| 6 | Northern Flicker | Colaptes auratus | Woodpeckers | 70 | Sep (peak) |
| 7 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 62 | Apr (past peak) |
| 8 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 62 | Aug (past peak) |
| 9 | Black-billed Magpie | Pica hudsonia | Crows, Jays, and Magpies | 59 | Jun (past peak) |
| 10 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 48 | Jan (past peak) |
| 11 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 42 | May (past peak) |
| 12 | Rock Wren | Salpinctes obsoletus | Wrens | 42 | Aug (past peak) |
| 13 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 42 | May (past peak) |
| 14 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 41 | Apr (past peak) |
| 15 | American White Pelican | Pelecanus erythrorhynchos | Pelicans | 37 | Apr (past peak) |
| 16 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 37 | Apr (past peak) |
| 17 | Barn Swallow | Hirundo rustica | Swallows and Martins | 37 | Jul (past peak) |
| 18 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 35 | May (past peak) |
| 19 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 34 | May (past peak) |
| 20 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 33 | May (past peak) |
| 21 | American Kestrel | Falco sparverius | Falcons and Caracaras | 30 | Apr (past peak) |
| 22 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 30 | May (past peak) |
| 23 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 28 | May (past peak) |
| 24 | Vesper Sparrow | Pooecetes gramineus | New World Sparrows | 28 | Apr (past peak) |
| 25 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 28 | Jul (past peak) |
| 26 | Osprey | Pandion haliaetus | Ospreys | 28 | Jul (past peak) |
| 27 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 27 | Apr (past peak) |
| 28 | Song Sparrow | Melospiza melodia | New World Sparrows | 27 | Apr (past peak) |
| 29 | Clay-colored Sparrow | Spizella pallida | New World Sparrows | 27 | May (past peak) |
| 30 | Spotted Towhee | Pipilo maculatus | New World Sparrows | 27 | Jun (past peak) |
| 31 | Franklin's Gull | Leucophaeus pipixcan | Gulls, Terns, and Skimmers | 27 | Aug (past peak) |
| 32 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 27 | May (past peak) |
| 33 | Red-headed Woodpecker | Melanerpes erythrocephalus | Woodpeckers | 26 | Aug (past peak) |
| 34 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 25 | May (past peak) |
| 35 | Chipping Sparrow | Spizella passerina | New World Sparrows | 25 | May (past peak) |
| 36 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 25 | Jun (past peak) |
| 37 | Burrowing Owl | Athene cunicularia | Typical Owls | 25 | Jul (past peak) |
| 38 | Northern Yellow Warbler | Setophaga aestiva | New World Warblers | 25 | May (past peak) |
| 39 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 24 | May (past peak) |
| 40 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 24 | May (past peak) |
| 41 | Orange-crowned Warbler | Leiothlypis celata | New World Warblers | 24 | May (past peak) |
| 42 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 23 | Apr (past peak) |
| 43 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 23 | Jul (past peak) |
| 44 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 23 | May (past peak) |
| 45 | Savannah Sparrow | Passerculus sandwichensis | New World Sparrows | 22 | May (past peak) |
| 46 | Wilson's Warbler | Cardellina pusilla | New World Warblers | 22 | Sep (peak) |
| 47 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 22 | Aug (past peak) |
| 48 | Northern House Wren | Troglodytes aedon | Wrens | 21 | May (past peak) |
| 49 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 20 | Aug (past peak) |
| 50 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 20 | Jul (past peak) |