60 birds were recorded seen in Indiana in October in our iNaturalist sample; 1 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in October

Yellow-rumped Warbler

Great Blue Heron

House Sparrow

Mallard
Canada Goose
Downy Woodpecker

Red-tailed Hawk

American Robin

Blue Jay

Tennessee Warbler

Turkey Vulture

Northern Cardinal
All birds seen in Indiana in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 281 | Apr (past peak) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 264 | May (past peak) |
| 3 | House Sparrow | Passer domesticus | Old World Sparrows | 219 | Apr (past peak) |
| 4 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 201 | Apr (past peak) |
| 5 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 176 | Apr (past peak) |
| 6 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 171 | Apr (past peak) |
| 7 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 167 | Sep (past peak) |
| 8 | American Robin | Turdus migratorius | Thrushes | 159 | Apr (past peak) |
| 9 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 158 | May (past peak) |
| 10 | Tennessee Warbler | Leiothlypis peregrina | New World Warblers | 158 | Sep (past peak) |
| 11 | Turkey Vulture | Cathartes aura | New World Vultures | 151 | Apr (past peak) |
| 12 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 140 | Apr (past peak) |
| 13 | Eastern Bluebird | Sialia sialis | Thrushes | 131 | Apr (past peak) |
| 14 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 130 | Apr (past peak) |
| 15 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 126 | Aug (past peak) |
| 16 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 122 | Apr (past peak) |
| 17 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 121 | Apr (past peak) |
| 18 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 117 | Apr (past peak) |
| 19 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 111 | May (past peak) |
| 20 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 103 | Jan (past peak) |
| 21 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 99 | Sep (past peak) |
| 22 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 99 | Apr (past peak) |
| 23 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 96 | Aug (past peak) |
| 24 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 93 | Oct (peak) |
| 25 | Sandhill Crane | Antigone canadensis | Cranes | 91 | Feb (past peak) |
| 26 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 90 | Apr (past peak) |
| 27 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 89 | Apr (past peak) |
| 28 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 89 | Apr (past peak) |
| 29 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 88 | Apr (past peak) |
| 30 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 86 | Apr (past peak) |
| 31 | Northern Flicker | Colaptes auratus | Woodpeckers | 84 | Apr (past peak) |
| 32 | Song Sparrow | Melospiza melodia | New World Sparrows | 83 | May (past peak) |
| 33 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 81 | Sep (past peak) |
| 34 | European Starling | Sturnus vulgaris | Starlings | 78 | Apr (past peak) |
| 35 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 72 | May (past peak) |
| 36 | Carolina Wren | Thryothorus ludovicianus | Wrens | 70 | Apr (past peak) |
| 37 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 69 | May (past peak) |
| 38 | Swamp Sparrow | Melospiza georgiana | New World Sparrows | 69 | Apr (past peak) |
| 39 | Red-headed Woodpecker | Melanerpes erythrocephalus | Woodpeckers | 69 | May (past peak) |
| 40 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 67 | May (past peak) |
| 41 | Palm Warbler | Setophaga palmarum | New World Warblers | 65 | May (past peak) |
| 42 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 64 | Apr (past peak) |
| 43 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 61 | Apr (past peak) |
| 44 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 61 | Apr (past peak) |
| 45 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 57 | May (past peak) |
| 46 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 56 | Apr (past peak) |
| 47 | Black-throated Green Warbler | Setophaga virens | New World Warblers | 56 | Sep (past peak) |
| 48 | American White Pelican | Pelecanus erythrorhynchos | Pelicans | 55 | Apr (past peak) |
| 49 | Chipping Sparrow | Spizella passerina | New World Sparrows | 55 | Apr (past peak) |
| 50 | Bay-breasted Warbler | Setophaga castanea | New World Warblers | 54 | Sep (past peak) |