60 birds were recorded seen in New Hampshire in September in our iNaturalist sample; 2 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September

Wild Turkey

Great Blue Heron
Eastern Phoebe

Mallard

Black-capped Chickadee

Blue Jay

Broad-winged Hawk

Double-crested Cormorant
Common Loon

Bald Eagle

Northern Flicker
Downy Woodpecker
All birds seen in New Hampshire in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 274 | Apr (past peak) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 194 | Aug (past peak) |
| 3 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 187 | May (past peak) |
| 4 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 121 | Jul (past peak) |
| 5 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 121 | Apr (past peak) |
| 6 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 117 | May (past peak) |
| 7 | Broad-winged Hawk | Buteo platypterus | Hawks, Eagles, and Kites | 111 | Aug (past peak) |
| 8 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 107 | Aug (past peak) |
| 9 | Common Loon | Gavia immer | Loons | 96 | Jul (past peak) |
| 10 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 95 | Jul (past peak) |
| 11 | Northern Flicker | Colaptes auratus | Woodpeckers | 92 | Apr (past peak) |
| 12 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 92 | Apr (past peak) |
| 13 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 86 | May (past peak) |
| 14 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 84 | May (past peak) |
| 15 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 82 | Apr (past peak) |
| 16 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 81 | Aug (past peak) |
| 17 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 81 | May (past peak) |
| 18 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 80 | Apr (past peak) |
| 19 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 74 | Aug (past peak) |
| 20 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 73 | Aug (past peak) |
| 21 | Chipping Sparrow | Spizella passerina | New World Sparrows | 71 | May (past peak) |
| 22 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 71 | May (past peak) |
| 23 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 68 | Oct (rising) |
| 24 | Song Sparrow | Melospiza melodia | New World Sparrows | 67 | Jul (past peak) |
| 25 | American Robin | Turdus migratorius | Thrushes | 61 | May (past peak) |
| 26 | Turkey Vulture | Cathartes aura | New World Vultures | 60 | Apr (past peak) |
| 27 | Barred Owl | Strix varia | Typical Owls | 60 | Jul (past peak) |
| 28 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 58 | Apr (past peak) |
| 29 | House Sparrow | Passer domesticus | Old World Sparrows | 58 | Jun (past peak) |
| 30 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 58 | Apr (past peak) |
| 31 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 56 | May (past peak) |
| 32 | Black-throated Green Warbler | Setophaga virens | New World Warblers | 56 | May (past peak) |
| 33 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 56 | Sep (peak) |
| 34 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 52 | Apr (past peak) |
| 35 | Canada Jay | Perisoreus canadensis | Crows, Jays, and Magpies | 51 | Oct (rising) |
| 36 | Hairy Woodpecker | Leuconotopicus villosus | Woodpeckers | 51 | May (past peak) |
| 37 | Sharp-shinned Hawk | Accipiter striatus | Hawks, Eagles, and Kites | 50 | Sep (peak) |
| 38 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 50 | May (past peak) |
| 39 | Ruby-throated Hummingbird | Archilochus colubris | Hummingbirds | 49 | Aug (past peak) |
| 40 | Eastern Bluebird | Sialia sialis | Thrushes | 47 | Apr (past peak) |
| 41 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 46 | Aug (past peak) |
| 42 | Solitary Sandpiper | Tringa solitaria | Sandpipers and Allies | 45 | May (past peak) |
| 43 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 44 | Aug (past peak) |
| 44 | Palm Warbler | Setophaga palmarum | New World Warblers | 44 | Apr (past peak) |
| 45 | Red-eyed Vireo | Vireo olivaceus | Vireos, Shrike-Babblers, and Erpornis | 41 | Jun (past peak) |
| 46 | Common Raven | Corvus corax | Crows, Jays, and Magpies | 39 | Jul (past peak) |
| 47 | Northern Parula | Setophaga americana | New World Warblers | 39 | May (past peak) |
| 48 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 37 | Jul (past peak) |
| 49 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 35 | May (past peak) |
| 50 | Blackpoll Warbler | Setophaga striata | New World Warblers | 35 | Jun (past peak) |