60 birds were recorded seen in Montana in September in our iNaturalist sample; 4 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in September
Black-billed Magpie

Red-tailed Hawk

Mallard

Bald Eagle
Dusky Grouse

American Robin

Common Merganser

Wild Turkey

White-crowned Sparrow

Northern Flicker

Mountain Bluebird
Canada Goose
All birds seen in Montana in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Black-billed Magpie | Pica hudsonia | Crows, Jays, and Magpies | 183 | Jun (past peak) |
| 2 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 133 | Sep (peak) |
| 3 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 125 | May (past peak) |
| 4 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 123 | Jul (past peak) |
| 5 | Dusky Grouse | Dendragapus obscurus | Pheasants, Grouse, and Allies | 104 | Aug (past peak) |
| 6 | American Robin | Turdus migratorius | Thrushes | 100 | Jun (past peak) |
| 7 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 96 | Jul (past peak) |
| 8 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 95 | May (past peak) |
| 9 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 93 | Jul (past peak) |
| 10 | Northern Flicker | Colaptes auratus | Woodpeckers | 91 | Jul (past peak) |
| 11 | Mountain Bluebird | Sialia currucoides | Thrushes | 84 | Jun (past peak) |
| 12 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 76 | May (past peak) |
| 13 | American Dipper | Cinclus mexicanus | Dippers | 74 | Jul (past peak) |
| 14 | Canada Jay | Perisoreus canadensis | Crows, Jays, and Magpies | 73 | Sep (peak) |
| 15 | Osprey | Pandion haliaetus | Ospreys | 73 | Aug (past peak) |
| 16 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 67 | Jul (past peak) |
| 17 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 67 | Aug (past peak) |
| 18 | Steller's Jay | Cyanocitta stelleri | Crows, Jays, and Magpies | 67 | Jun (past peak) |
| 19 | Brewer's Blackbird | Euphagus cyanocephalus | New World Blackbirds and Orioles | 66 | Jun (past peak) |
| 20 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 66 | May (past peak) |
| 21 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 64 | Apr (past peak) |
| 22 | Common Raven | Corvus corax | Crows, Jays, and Magpies | 62 | Jun (past peak) |
| 23 | Great Horned Owl | Bubo virginianus | Typical Owls | 62 | May (past peak) |
| 24 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 59 | Sep (peak) |
| 25 | Turkey Vulture | Cathartes aura | New World Vultures | 58 | Jun (past peak) |
| 26 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 57 | Aug (past peak) |
| 27 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 55 | Jul (past peak) |
| 28 | Spruce Grouse | Canachites canadensis | Pheasants, Grouse, and Allies | 52 | Aug (past peak) |
| 29 | Swainson's Hawk | Buteo swainsoni | Hawks, Eagles, and Kites | 51 | Jun (past peak) |
| 30 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 51 | Jul (past peak) |
| 31 | Pine Siskin | Spinus pinus | Finches, Euphonias, and Allies | 51 | Jun (past peak) |
| 32 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 50 | Aug (past peak) |
| 33 | Clark's Nutcracker | Nucifraga columbiana | Crows, Jays, and Magpies | 49 | Aug (past peak) |
| 34 | Western Meadowlark | Sturnella neglecta | New World Blackbirds and Orioles | 49 | Jun (past peak) |
| 35 | European Starling | Sturnus vulgaris | Starlings | 49 | Jun (past peak) |
| 36 | Savannah Sparrow | Passerculus sandwichensis | New World Sparrows | 47 | Jun (past peak) |
| 37 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 47 | May (past peak) |
| 38 | American Kestrel | Falco sparverius | Falcons and Caracaras | 44 | Aug (past peak) |
| 39 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 43 | Jun (past peak) |
| 40 | Chipping Sparrow | Spizella passerina | New World Sparrows | 42 | May (past peak) |
| 41 | Sandhill Crane | Antigone canadensis | Cranes | 42 | May (past peak) |
| 42 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 41 | Aug (past peak) |
| 43 | Ruffed Grouse | Bonasa umbellus | Pheasants, Grouse, and Allies | 40 | Oct (rising) |
| 44 | Common Goldeneye | Bucephala clangula | Ducks, Geese, and Swans | 40 | Mar (past peak) |
| 45 | Wilson's Warbler | Cardellina pusilla | New World Warblers | 40 | Sep (peak) |
| 46 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 39 | Apr (past peak) |
| 47 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 39 | Jun (past peak) |
| 48 | American Pipit | Anthus rubescens | Wagtails and Pipits | 39 | Aug (past peak) |
| 49 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 38 | Jul (past peak) |
| 50 | American White Pelican | Pelecanus erythrorhynchos | Pelicans | 38 | Jun (past peak) |