60 birds were recorded seen in Hawaii in September in our iNaturalist sample; 6 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September

Pacific Golden-Plover

Zebra Dove

Red-crested Cardinal
Common Myna

Western Cattle-Egret
Hawaiian Goose

Black-crowned Night Heron

Saffron Finch

House Sparrow

Java Sparrow

Spotted Dove

Common Waxbill
All birds seen in Hawaii in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Pacific Golden-Plover | Pluvialis fulva | Plovers and Lapwings | 804 | Mar (past peak) |
| 2 | Zebra Dove | Geopelia striata | Pigeons and Doves | 673 | Dec (rising) |
| 3 | Red-crested Cardinal | Paroaria coronata | Tanagers and Allies | 619 | Jun (past peak) |
| 4 | Common Myna | Acridotheres tristis | Starlings | 522 | Mar (past peak) |
| 5 | Western Cattle-Egret | Ardea ibis | Herons, Egrets, and Bitterns | 522 | Dec (rising) |
| 6 | Hawaiian Goose | Branta sandvicensis | Ducks, Geese, and Swans | 428 | Dec (rising) |
| 7 | Black-crowned Night Heron | Nycticorax nycticorax | Herons, Egrets, and Bitterns | 371 | Mar (past peak) |
| 8 | Saffron Finch | Sicalis flaveola | Tanagers and Allies | 358 | Jan (past peak) |
| 9 | House Sparrow | Passer domesticus | Old World Sparrows | 286 | Aug (past peak) |
| 10 | Java Sparrow | Padda oryzivora | Waxbills and Allies | 268 | Dec (rising) |
| 11 | Spotted Dove | Spilopelia chinensis | Pigeons and Doves | 264 | Mar (past peak) |
| 12 | Common Waxbill | Estrilda astrild | Waxbills and Allies | 250 | Jan (past peak) |
| 13 | White-rumped Shama | Copsychus malabaricus | Old World Flycatchers, Robins, and Chats | 236 | May (past peak) |
| 14 | Warbling White-eye | Zosterops japonicus | White-eyes, Yuhinas, and Allies | 220 | Mar (past peak) |
| 15 | Yellow-billed Cardinal | Paroaria capitata | Tanagers and Allies | 199 | Jul (past peak) |
| 16 | Red-vented Bulbul | Pycnonotus cafer | Bulbuls | 197 | Apr (past peak) |
| 17 | Wandering Tattler | Tringa incana | Sandpipers and Allies | 171 | Jan (past peak) |
| 18 | Ruddy Turnstone | Arenaria interpres | Sandpipers and Allies | 163 | Jan (past peak) |
| 19 | Red-footed Booby | Sula sula | Boobies and Gannets | 148 | Dec (rising) |
| 20 | ʻApapane | Himatione sanguinea | Finches, Euphonias, and Allies | 143 | Mar (past peak) |
| 21 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 96 | Mar (past peak) |
| 22 | Chukar | Alectoris chukar | Pheasants, Grouse, and Allies | 91 | Sep (peak) |
| 23 | Scaly-breasted Munia | Lonchura punctulata | Waxbills and Allies | 73 | Feb (past peak) |
| 24 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 58 | Apr (past peak) |
| 25 | Sanderling | Calidris alba | Sandpipers and Allies | 49 | Dec (rising) |
| 26 | Red-whiskered Bulbul | Pycnonotus jocosus | Bulbuls | 47 | Mar (past peak) |
| 27 | Rosy-faced Lovebird | Agapornis roseicollis | Old World Parrots | 42 | Jan (past peak) |
| 28 | Indian Peafowl | Pavo cristatus | Pheasants, Grouse, and Allies | 35 | Mar (past peak) |
| 29 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 33 | Mar (past peak) |
| 30 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 22 | Dec (rising) |
| 31 | Red-masked Parakeet | Psittacara erythrogenys | New World and African Parrots | 20 | Jan (past peak) |
| 32 | White-faced Ibis | Plegadis chihi | Ibises and Spoonbills | 15 | Jan (past peak) |
| 33 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 14 | Mar (past peak) |
| 34 | Pectoral Sandpiper | Calidris melanotos | Sandpipers and Allies | 13 | Oct (rising) |
| 35 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 12 | Mar (past peak) |
| 36 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 12 | Mar (past peak) |
| 37 | Least Tern | Sternula antillarum | Gulls, Terns, and Skimmers | 9 | Sep (peak) |
| 38 | Semipalmated Plover | Charadrius semipalmatus | Plovers and Lapwings | 8 | Jan (past peak) |
| 39 | Red-crowned Amazon | Amazona viridigenalis | New World and African Parrots | 8 | Jan (past peak) |
| 40 | Least Sandpiper | Calidris minutilla | Sandpipers and Allies | 7 | Sep (peak) |
| 41 | American Barn Owl | Tyto furcata | Barn Owls | 7 | May (past peak) |
| 42 | Common Tern | Sterna hirundo | Gulls, Terns, and Skimmers | 5 | Sep (peak) |
| 43 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 5 | Nov (rising) |
| 44 | Lesser Yellowlegs | Tringa flavipes | Sandpipers and Allies | 4 | Jan (past peak) |
| 45 | Common Gallinule | Gallinula galeata | Rails, Gallinules, and Coots | 4 | Jun (past peak) |
| 46 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 4 | Dec (rising) |
| 47 | California Quail | Callipepla californica | New World Quails | 3 | Mar (past peak) |
| 48 | Short-billed Dowitcher | Limnodromus griseus | Sandpipers and Allies | 3 | Sep (peak) |
| 49 | Solitary Sandpiper | Tringa solitaria | Sandpipers and Allies | 3 | Sep (peak) |
| 50 | Black-necked Stilt | Himantopus mexicanus | Stilts and Avocets | 3 | Mar (past peak) |