60 birds were recorded seen in Mississippi in September in our iNaturalist sample; 5 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

Little Blue Heron

Great Egret

Northern Mockingbird

Great Blue Heron
Common Yellowthroat

Pine Warbler

Green Heron

Blue Jay

Carolina Chickadee

Carolina Wren
All birds seen in Mississippi in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 226 | Sep (peak) |
| 2 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 158 | Aug (past peak) |
| 3 | Little Blue Heron | Egretta caerulea | Herons, Egrets, and Bitterns | 131 | Aug (past peak) |
| 4 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 128 | Dec (rising) |
| 5 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 117 | Apr (past peak) |
| 6 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 115 | Dec (rising) |
| 7 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 79 | Oct (rising) |
| 8 | Pine Warbler | Setophaga pinus | New World Warblers | 76 | Jan (past peak) |
| 9 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 73 | Jun (past peak) |
| 10 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 70 | Oct (rising) |
| 11 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 70 | Jan (past peak) |
| 12 | Carolina Wren | Thryothorus ludovicianus | Wrens | 63 | Apr (past peak) |
| 13 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 59 | Jan (past peak) |
| 14 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 58 | Apr (past peak) |
| 15 | Eastern Bluebird | Sialia sialis | Thrushes | 56 | Apr (past peak) |
| 16 | White Ibis | Eudocimus albus | Ibises and Spoonbills | 55 | Oct (rising) |
| 17 | Anhinga | Anhinga anhinga | Darters | 55 | Sep (peak) |
| 18 | Yellow-crowned Night Heron | Nyctanassa violacea | Herons, Egrets, and Bitterns | 53 | Jun (past peak) |
| 19 | Sanderling | Calidris alba | Sandpipers and Allies | 52 | May (past peak) |
| 20 | Summer Tanager | Piranga rubra | Cardinals and Allies | 52 | Apr (past peak) |
| 21 | Brown Pelican | Pelecanus occidentalis | Pelicans | 50 | Apr (past peak) |
| 22 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 50 | Mar (past peak) |
| 23 | White-eyed Vireo | Vireo griseus | Vireos, Shrike-Babblers, and Erpornis | 47 | Apr (past peak) |
| 24 | Wood Stork | Mycteria americana | Storks | 46 | Sep (peak) |
| 25 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 46 | Apr (past peak) |
| 26 | Turkey Vulture | Cathartes aura | New World Vultures | 40 | Jan (past peak) |
| 27 | Snowy Egret | Egretta thula | Herons, Egrets, and Bitterns | 40 | Apr (past peak) |
| 28 | American Redstart | Setophaga ruticilla | New World Warblers | 39 | Oct (rising) |
| 29 | Eastern Wood-Pewee | Contopus virens | Tyrant Flycatchers | 39 | May (past peak) |
| 30 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 39 | Dec (rising) |
| 31 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 38 | Apr (past peak) |
| 32 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 38 | Jan (past peak) |
| 33 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 36 | Aug (past peak) |
| 34 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 36 | Jan (past peak) |
| 35 | Northern Yellow Warbler | Setophaga aestiva | New World Warblers | 36 | Sep (peak) |
| 36 | Black Skimmer | Rynchops niger | Gulls, Terns, and Skimmers | 35 | Apr (past peak) |
| 37 | Roseate Spoonbill | Platalea ajaja | Ibises and Spoonbills | 33 | Aug (past peak) |
| 38 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 31 | Apr (past peak) |
| 39 | Willet | Tringa semipalmata | Sandpipers and Allies | 31 | Apr (past peak) |
| 40 | Brown Thrasher | Toxostoma rufum | Mockingbirds and Thrashers | 30 | Apr (past peak) |
| 41 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 29 | Dec (rising) |
| 42 | Purple Gallinule | Porphyrio martinica | Rails, Gallinules, and Coots | 28 | May (past peak) |
| 43 | Tricolored Heron | Egretta tricolor | Herons, Egrets, and Bitterns | 28 | Sep (peak) |
| 44 | Brown-headed Nuthatch | Sitta pusilla | Nuthatches | 27 | Jan (past peak) |
| 45 | Ruddy Turnstone | Arenaria interpres | Sandpipers and Allies | 26 | Apr (past peak) |
| 46 | Black Vulture | Coragyps atratus | New World Vultures | 26 | Apr (past peak) |
| 47 | Black-bellied Whistling-Duck | Dendrocygna autumnalis | Ducks, Geese, and Swans | 26 | May (past peak) |
| 48 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 26 | Mar (past peak) |
| 49 | Red-headed Woodpecker | Melanerpes erythrocephalus | Woodpeckers | 26 | Apr (past peak) |
| 50 | Magnolia Warbler | Setophaga magnolia | New World Warblers | 26 | Oct (rising) |