60 birds were recorded seen in Montana in October 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 October
Black-billed Magpie

Northern Flicker

Bald Eagle

Red-tailed Hawk
Ruffed Grouse

Mallard

Steller's Jay

White-crowned Sparrow

Great Horned Owl
Canada Goose

House Sparrow

Dark-eyed Junco
All birds seen in Montana in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Black-billed Magpie | Pica hudsonia | Crows, Jays, and Magpies | 121 | Jun (past peak) |
| 2 | Northern Flicker | Colaptes auratus | Woodpeckers | 91 | Jul (past peak) |
| 3 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 80 | Jul (past peak) |
| 4 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 69 | Sep (past peak) |
| 5 | Ruffed Grouse | Bonasa umbellus | Pheasants, Grouse, and Allies | 59 | Oct (peak) |
| 6 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 56 | May (past peak) |
| 7 | Steller's Jay | Cyanocitta stelleri | Crows, Jays, and Magpies | 54 | Jun (past peak) |
| 8 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 54 | Jul (past peak) |
| 9 | Great Horned Owl | Bubo virginianus | Typical Owls | 45 | May (past peak) |
| 10 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 42 | May (past peak) |
| 11 | House Sparrow | Passer domesticus | Old World Sparrows | 40 | May (past peak) |
| 12 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 38 | Jul (past peak) |
| 13 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 37 | May (past peak) |
| 14 | American Dipper | Cinclus mexicanus | Dippers | 35 | Jul (past peak) |
| 15 | European Starling | Sturnus vulgaris | Starlings | 34 | Jun (past peak) |
| 16 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 34 | Jun (past peak) |
| 17 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 34 | Apr (past peak) |
| 18 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 32 | Aug (past peak) |
| 19 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 31 | Aug (past peak) |
| 20 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 31 | Jul (past peak) |
| 21 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 31 | Oct (peak) |
| 22 | Townsend's Solitaire | Myadestes townsendi | Thrushes | 30 | Apr (past peak) |
| 23 | Dusky Grouse | Dendragapus obscurus | Pheasants, Grouse, and Allies | 29 | Aug (past peak) |
| 24 | Northern Shrike | Lanius borealis | Shrikes | 29 | Oct (peak) |
| 25 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 28 | Oct (peak) |
| 26 | Clark's Nutcracker | Nucifraga columbiana | Crows, Jays, and Magpies | 28 | Aug (past peak) |
| 27 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 27 | Apr (past peak) |
| 28 | Common Loon | Gavia immer | Loons | 27 | Jul (past peak) |
| 29 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 27 | Jul (past peak) |
| 30 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 27 | Jul (past peak) |
| 31 | American Robin | Turdus migratorius | Thrushes | 27 | Jun (past peak) |
| 32 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 26 | Jul (past peak) |
| 33 | Golden Eagle | Aquila chrysaetos | Hawks, Eagles, and Kites | 26 | Jun (past peak) |
| 34 | Common Raven | Corvus corax | Crows, Jays, and Magpies | 26 | Jun (past peak) |
| 35 | Song Sparrow | Melospiza melodia | New World Sparrows | 26 | Jun (past peak) |
| 36 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 26 | Aug (past peak) |
| 37 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 26 | May (past peak) |
| 38 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 25 | Oct (peak) |
| 39 | Mountain Chickadee | Poecile gambeli | Tits, Chickadees, and Titmice | 25 | Jun (past peak) |
| 40 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 24 | Jun (past peak) |
| 41 | American Tree Sparrow | Spizelloides arborea | New World Sparrows | 24 | Oct (peak) |
| 42 | Hairy Woodpecker | Leuconotopicus villosus | Woodpeckers | 24 | Aug (past peak) |
| 43 | Canada Jay | Perisoreus canadensis | Crows, Jays, and Magpies | 23 | Sep (past peak) |
| 44 | American Pipit | Anthus rubescens | Wagtails and Pipits | 23 | Aug (past peak) |
| 45 | Wilson's Snipe | Gallinago delicata | Sandpipers and Allies | 23 | Jul (past peak) |
| 46 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 22 | May (past peak) |
| 47 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 21 | Aug (past peak) |
| 48 | Western Meadowlark | Sturnella neglecta | New World Blackbirds and Orioles | 21 | Jun (past peak) |
| 49 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 20 | May (past peak) |
| 50 | Rough-legged Hawk | Buteo lagopus | Hawks, Eagles, and Kites | 19 | Jan (past peak) |