60 birds were recorded seen in South Carolina in September in our iNaturalist sample; 7 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

Northern Cardinal

Mourning Dove
House Finch

Great Egret
Eastern Bluebird

Great Blue Heron

Laughing Gull

American Goldfinch

Northern Mockingbird

Carolina Chickadee

White Ibis
All birds seen in South Carolina in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 969 | Sep (peak) |
| 2 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 881 | Apr (past peak) |
| 3 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 578 | Apr (past peak) |
| 4 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 508 | May (past peak) |
| 5 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 426 | Jun (past peak) |
| 6 | Eastern Bluebird | Sialia sialis | Thrushes | 388 | Apr (past peak) |
| 7 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 362 | Jun (past peak) |
| 8 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 349 | Jun (past peak) |
| 9 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 345 | Feb (past peak) |
| 10 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 343 | Apr (past peak) |
| 11 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 297 | Oct (rising) |
| 12 | White Ibis | Eudocimus albus | Ibises and Spoonbills | 279 | Jul (past peak) |
| 13 | Carolina Wren | Thryothorus ludovicianus | Wrens | 265 | Apr (past peak) |
| 14 | Turkey Vulture | Cathartes aura | New World Vultures | 256 | Jan (past peak) |
| 15 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 253 | Apr (past peak) |
| 16 | Sanderling | Calidris alba | Sandpipers and Allies | 252 | Oct (rising) |
| 17 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 252 | Mar (past peak) |
| 18 | Anhinga | Anhinga anhinga | Darters | 245 | Jun (past peak) |
| 19 | Snowy Egret | Egretta thula | Herons, Egrets, and Bitterns | 241 | Mar (past peak) |
| 20 | Tricolored Heron | Egretta tricolor | Herons, Egrets, and Bitterns | 234 | Jun (past peak) |
| 21 | American Redstart | Setophaga ruticilla | New World Warblers | 224 | Sep (peak) |
| 22 | Wood Stork | Mycteria americana | Storks | 221 | Aug (past peak) |
| 23 | Little Blue Heron | Egretta caerulea | Herons, Egrets, and Bitterns | 212 | Jun (past peak) |
| 24 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 202 | Jan (past peak) |
| 25 | Roseate Spoonbill | Platalea ajaja | Ibises and Spoonbills | 192 | Sep (peak) |
| 26 | Brown Thrasher | Toxostoma rufum | Mockingbirds and Thrashers | 188 | May (past peak) |
| 27 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 185 | Apr (past peak) |
| 28 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 177 | Apr (past peak) |
| 29 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 170 | May (past peak) |
| 30 | Willet | Tringa semipalmata | Sandpipers and Allies | 169 | Mar (past peak) |
| 31 | Brown-headed Nuthatch | Sitta pusilla | Nuthatches | 168 | Jan (past peak) |
| 32 | Pine Warbler | Setophaga pinus | New World Warblers | 158 | Jan (past peak) |
| 33 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 153 | Jul (past peak) |
| 34 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 152 | Apr (past peak) |
| 35 | Brown Pelican | Pelecanus occidentalis | Pelicans | 145 | Jun (past peak) |
| 36 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 145 | Sep (peak) |
| 37 | Osprey | Pandion haliaetus | Ospreys | 144 | Mar (past peak) |
| 38 | Painted Bunting | Passerina ciris | Cardinals and Allies | 143 | May (past peak) |
| 39 | Eastern Wood-Pewee | Contopus virens | Tyrant Flycatchers | 142 | Sep (peak) |
| 40 | Black Vulture | Coragyps atratus | New World Vultures | 140 | Apr (past peak) |
| 41 | Royal Tern | Thalasseus maximus | Gulls, Terns, and Skimmers | 128 | May (past peak) |
| 42 | Prairie Warbler | Setophaga discolor | New World Warblers | 128 | Sep (peak) |
| 43 | Boat-tailed Grackle | Quiscalus major | New World Blackbirds and Orioles | 117 | Mar (past peak) |
| 44 | Red-eyed Vireo | Vireo olivaceus | Vireos, Shrike-Babblers, and Erpornis | 115 | Sep (peak) |
| 45 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 101 | Mar (past peak) |
| 46 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 96 | Jun (past peak) |
| 47 | Northern Parula | Setophaga americana | New World Warblers | 94 | Apr (past peak) |
| 48 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 93 | Mar (past peak) |
| 49 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 91 | Oct (rising) |
| 50 | White-eyed Vireo | Vireo griseus | Vireos, Shrike-Babblers, and Erpornis | 89 | Apr (past peak) |