60 birds were recorded seen in Missouri in September in our iNaturalist sample; 8 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September

Ruby-throated Hummingbird

Great Blue Heron
Common Yellowthroat

Mourning Dove

Turkey Vulture
Ovenbird

Northern Cardinal

Black-and-white Warbler

Red-shouldered Hawk

Great Egret

American Goldfinch

Wild Turkey
All birds seen in Missouri in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 475 | Sep (peak) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 240 | May (past peak) |
| 3 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 224 | May (past peak) |
| 4 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 220 | Apr (past peak) |
| 5 | Turkey Vulture | Cathartes aura | New World Vultures | 218 | Apr (past peak) |
| 6 | Ovenbird | Seiurus aurocapilla | New World Warblers | 214 | May (past peak) |
| 7 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 182 | Apr (past peak) |
| 8 | Black-and-white Warbler | Mniotilta varia | New World Warblers | 174 | Sep (peak) |
| 9 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 162 | Mar (past peak) |
| 10 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 161 | Apr (past peak) |
| 11 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 159 | Apr (past peak) |
| 12 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 156 | Apr (past peak) |
| 13 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 152 | Nov (rising) |
| 14 | Magnolia Warbler | Setophaga magnolia | New World Warblers | 139 | Sep (peak) |
| 15 | Tennessee Warbler | Leiothlypis peregrina | New World Warblers | 131 | May (past peak) |
| 16 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 130 | Mar (past peak) |
| 17 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 129 | Apr (past peak) |
| 18 | House Sparrow | Passer domesticus | Old World Sparrows | 129 | May (past peak) |
| 19 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 128 | Apr (past peak) |
| 20 | Nashville Warbler | Leiothlypis ruficapilla | New World Warblers | 124 | May (past peak) |
| 21 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 121 | Apr (past peak) |
| 22 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 115 | Apr (past peak) |
| 23 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 114 | Aug (past peak) |
| 24 | Eastern Wood-Pewee | Contopus virens | Tyrant Flycatchers | 112 | May (past peak) |
| 25 | American Redstart | Setophaga ruticilla | New World Warblers | 111 | May (past peak) |
| 26 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 108 | Sep (peak) |
| 27 | American Robin | Turdus migratorius | Thrushes | 107 | Apr (past peak) |
| 28 | Indigo Bunting | Passerina cyanea | Cardinals and Allies | 105 | May (past peak) |
| 29 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 105 | Apr (past peak) |
| 30 | Northern Flicker | Colaptes auratus | Woodpeckers | 105 | Mar (past peak) |
| 31 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 99 | Jan (past peak) |
| 32 | Black-throated Green Warbler | Setophaga virens | New World Warblers | 96 | Sep (peak) |
| 33 | Eastern Bluebird | Sialia sialis | Thrushes | 95 | Apr (past peak) |
| 34 | Bay-breasted Warbler | Setophaga castanea | New World Warblers | 94 | Sep (peak) |
| 35 | Barred Owl | Strix varia | Typical Owls | 90 | Apr (past peak) |
| 36 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 87 | Apr (past peak) |
| 37 | Summer Tanager | Piranga rubra | Cardinals and Allies | 82 | May (past peak) |
| 38 | Chestnut-sided Warbler | Setophaga pensylvanica | New World Warblers | 79 | May (past peak) |
| 39 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 78 | May (past peak) |
| 40 | Yellow-billed Cuckoo | Coccyzus americanus | Cuckoos | 77 | May (past peak) |
| 41 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 76 | Mar (past peak) |
| 42 | Northern Waterthrush | Parkesia noveboracensis | New World Warblers | 73 | Sep (peak) |
| 43 | Carolina Wren | Thryothorus ludovicianus | Wrens | 70 | Apr (past peak) |
| 44 | Red-headed Woodpecker | Melanerpes erythrocephalus | Woodpeckers | 68 | May (past peak) |
| 45 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 60 | May (past peak) |
| 46 | Northern Parula | Setophaga americana | New World Warblers | 57 | Apr (past peak) |
| 47 | European Starling | Sturnus vulgaris | Starlings | 56 | May (past peak) |
| 48 | Common Nighthawk | Chordeiles minor | Nightjars and Allies | 54 | Sep (peak) |
| 49 | American White Pelican | Pelecanus erythrorhynchos | Pelicans | 52 | Mar (past peak) |
| 50 | Brown Thrasher | Toxostoma rufum | Mockingbirds and Thrashers | 52 | May (past peak) |