60 birds were recorded seen in Rhode Island in September in our iNaturalist sample; 3 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September

Double-crested Cormorant

American Herring Gull

Laughing Gull

Great Blue Heron

Ring-billed Gull

Great Egret

House Sparrow

Semipalmated Plover

Great Black-backed Gull

American Goldfinch

Wild Turkey

Mourning Dove
All birds seen in Rhode Island in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 147 | Aug (past peak) |
| 2 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 139 | Aug (past peak) |
| 3 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 122 | Aug (past peak) |
| 4 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 104 | Jun (past peak) |
| 5 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 88 | Aug (past peak) |
| 6 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 84 | Jun (past peak) |
| 7 | House Sparrow | Passer domesticus | Old World Sparrows | 83 | May (past peak) |
| 8 | Semipalmated Plover | Charadrius semipalmatus | Plovers and Lapwings | 82 | Aug (past peak) |
| 9 | Great Black-backed Gull | Larus marinus | Gulls, Terns, and Skimmers | 79 | Jul (past peak) |
| 10 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 69 | Aug (past peak) |
| 11 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 68 | Apr (past peak) |
| 12 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 66 | Apr (past peak) |
| 13 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 66 | Oct (rising) |
| 14 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 62 | Apr (past peak) |
| 15 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 62 | May (past peak) |
| 16 | Mute Swan | Cygnus olor | Ducks, Geese, and Swans | 61 | Apr (past peak) |
| 17 | Osprey | Pandion haliaetus | Ospreys | 60 | Jun (past peak) |
| 18 | Sanderling | Calidris alba | Sandpipers and Allies | 56 | Sep (peak) |
| 19 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 52 | Apr (past peak) |
| 20 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 51 | Apr (past peak) |
| 21 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 50 | Apr (past peak) |
| 22 | Semipalmated Sandpiper | Calidris pusilla | Sandpipers and Allies | 46 | Aug (past peak) |
| 23 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 46 | Apr (past peak) |
| 24 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 46 | Apr (past peak) |
| 25 | Common Eider | Somateria mollissima | Ducks, Geese, and Swans | 42 | Jan (past peak) |
| 26 | American Robin | Turdus migratorius | Thrushes | 41 | Apr (past peak) |
| 27 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 40 | Apr (past peak) |
| 28 | Carolina Wren | Thryothorus ludovicianus | Wrens | 38 | May (past peak) |
| 29 | Song Sparrow | Melospiza melodia | New World Sparrows | 35 | May (past peak) |
| 30 | Black-bellied Plover | Pluvialis squatarola | Plovers and Lapwings | 34 | Sep (peak) |
| 31 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 33 | May (past peak) |
| 32 | Northern Flicker | Colaptes auratus | Woodpeckers | 31 | Jul (past peak) |
| 33 | European Starling | Sturnus vulgaris | Starlings | 30 | Apr (past peak) |
| 34 | Least Sandpiper | Calidris minutilla | Sandpipers and Allies | 29 | Aug (past peak) |
| 35 | American Oystercatcher | Haematopus palliatus | Oystercatchers | 29 | Jul (past peak) |
| 36 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 28 | Aug (past peak) |
| 37 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 28 | May (past peak) |
| 38 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 28 | Apr (past peak) |
| 39 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 27 | Dec (rising) |
| 40 | Ruddy Turnstone | Arenaria interpres | Sandpipers and Allies | 26 | Aug (past peak) |
| 41 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 26 | May (past peak) |
| 42 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 24 | Apr (past peak) |
| 43 | Spotted Sandpiper | Actitis macularius | Sandpipers and Allies | 24 | Aug (past peak) |
| 44 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 23 | Sep (peak) |
| 45 | Snowy Egret | Egretta thula | Herons, Egrets, and Bitterns | 23 | Jun (past peak) |
| 46 | Tree Swallow | Tachycineta bicolor | Swallows and Martins | 23 | May (past peak) |
| 47 | Greater Yellowlegs | Tringa melanoleuca | Sandpipers and Allies | 21 | Apr (past peak) |
| 48 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 20 | Aug (past peak) |
| 49 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 18 | Mar (past peak) |
| 50 | Turkey Vulture | Cathartes aura | New World Vultures | 18 | May (past peak) |