60 birds were recorded seen in New York 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

Great Blue Heron
Canada Goose

House Sparrow

Mallard
Common Yellowthroat

American Robin

Mourning Dove

Black-and-white Warbler

Red-tailed Hawk

American Redstart

Blue Jay

European Starling
All birds seen in New York in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 1,596 | Sep (peak) |
| 2 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 1,552 | Apr (past peak) |
| 3 | House Sparrow | Passer domesticus | Old World Sparrows | 1,550 | Apr (past peak) |
| 4 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 1,400 | Apr (past peak) |
| 5 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 1,382 | May (past peak) |
| 6 | American Robin | Turdus migratorius | Thrushes | 1,265 | Apr (past peak) |
| 7 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 1,197 | Apr (past peak) |
| 8 | Black-and-white Warbler | Mniotilta varia | New World Warblers | 1,093 | May (past peak) |
| 9 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 1,073 | Mar (past peak) |
| 10 | American Redstart | Setophaga ruticilla | New World Warblers | 984 | May (past peak) |
| 11 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 910 | Apr (past peak) |
| 12 | European Starling | Sturnus vulgaris | Starlings | 885 | Apr (past peak) |
| 13 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 882 | Apr (past peak) |
| 14 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 880 | Apr (past peak) |
| 15 | Northern Parula | Setophaga americana | New World Warblers | 872 | Sep (peak) |
| 16 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 839 | May (past peak) |
| 17 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 761 | Aug (past peak) |
| 18 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 708 | Apr (past peak) |
| 19 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 706 | Jun (past peak) |
| 20 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 673 | Oct (rising) |
| 21 | Magnolia Warbler | Setophaga magnolia | New World Warblers | 642 | May (past peak) |
| 22 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 619 | Aug (past peak) |
| 23 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 605 | Apr (past peak) |
| 24 | Northern Flicker | Colaptes auratus | Woodpeckers | 570 | Apr (past peak) |
| 25 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 547 | Aug (past peak) |
| 26 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 530 | Apr (past peak) |
| 27 | Green Heron | Butorides virescens | Herons, Egrets, and Bitterns | 512 | Aug (past peak) |
| 28 | Mute Swan | Cygnus olor | Ducks, Geese, and Swans | 502 | Apr (past peak) |
| 29 | Red-eyed Vireo | Vireo olivaceus | Vireos, Shrike-Babblers, and Erpornis | 498 | Sep (peak) |
| 30 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 487 | Aug (past peak) |
| 31 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 482 | Mar (past peak) |
| 32 | Black-throated Green Warbler | Setophaga virens | New World Warblers | 471 | Sep (peak) |
| 33 | Osprey | Pandion haliaetus | Ospreys | 467 | Apr (past peak) |
| 34 | Black-throated Blue Warbler | Setophaga caerulescens | New World Warblers | 451 | May (past peak) |
| 35 | Palm Warbler | Setophaga palmarum | New World Warblers | 450 | Oct (rising) |
| 36 | Ovenbird | Seiurus aurocapilla | New World Warblers | 431 | May (past peak) |
| 37 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 422 | Apr (past peak) |
| 38 | Turkey Vulture | Cathartes aura | New World Vultures | 417 | Apr (past peak) |
| 39 | Song Sparrow | Melospiza melodia | New World Sparrows | 414 | Apr (past peak) |
| 40 | Eastern Wood-Pewee | Contopus virens | Tyrant Flycatchers | 414 | Sep (peak) |
| 41 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 412 | Jul (past peak) |
| 42 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 393 | Jan (past peak) |
| 43 | Blackpoll Warbler | Setophaga striata | New World Warblers | 362 | May (past peak) |
| 44 | American Kestrel | Falco sparverius | Falcons and Caracaras | 328 | Oct (rising) |
| 45 | Swainson's Thrush | Catharus ustulatus | Thrushes | 326 | May (past peak) |
| 46 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 326 | Apr (past peak) |
| 47 | Rose-breasted Grosbeak | Pheucticus ludovicianus | Cardinals and Allies | 309 | May (past peak) |
| 48 | Yellow-crowned Night Heron | Nyctanassa violacea | Herons, Egrets, and Bitterns | 308 | Jul (past peak) |
| 49 | Tennessee Warbler | Leiothlypis peregrina | New World Warblers | 302 | Sep (peak) |
| 50 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 300 | Jun (past peak) |