60 birds were recorded seen in Wisconsin 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

Mallard

Dark-eyed Junco
Sandhill Crane

Yellow-rumped Warbler
Canada Goose

White-throated Sparrow

Wild Turkey

American Robin
Downy Woodpecker

Red-tailed Hawk

Black-capped Chickadee

Bald Eagle
All birds seen in Wisconsin in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 506 | Apr (past peak) |
| 2 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 485 | Oct (peak) |
| 3 | Sandhill Crane | Antigone canadensis | Cranes | 479 | May (past peak) |
| 4 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 420 | Apr (past peak) |
| 5 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 377 | May (past peak) |
| 6 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 362 | Apr (past peak) |
| 7 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 339 | May (past peak) |
| 8 | American Robin | Turdus migratorius | Thrushes | 331 | Apr (past peak) |
| 9 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 328 | Apr (past peak) |
| 10 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 307 | Sep (past peak) |
| 11 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 305 | Apr (past peak) |
| 12 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 300 | May (past peak) |
| 13 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 267 | Aug (past peak) |
| 14 | House Sparrow | Passer domesticus | Old World Sparrows | 264 | May (past peak) |
| 15 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 259 | Aug (past peak) |
| 16 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 234 | Aug (past peak) |
| 17 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 234 | May (past peak) |
| 18 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 219 | May (past peak) |
| 19 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 211 | May (past peak) |
| 20 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 207 | Apr (past peak) |
| 21 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 204 | Apr (past peak) |
| 22 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 199 | May (past peak) |
| 23 | Song Sparrow | Melospiza melodia | New World Sparrows | 197 | May (past peak) |
| 24 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 195 | Apr (past peak) |
| 25 | Hermit Thrush | Catharus guttatus | Thrushes | 186 | Apr (past peak) |
| 26 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 179 | Apr (past peak) |
| 27 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 161 | May (past peak) |
| 28 | Palm Warbler | Setophaga palmarum | New World Warblers | 149 | May (past peak) |
| 29 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 146 | Apr (past peak) |
| 30 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 144 | Apr (past peak) |
| 31 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 141 | Apr (past peak) |
| 32 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 133 | Apr (past peak) |
| 33 | European Starling | Sturnus vulgaris | Starlings | 133 | May (past peak) |
| 34 | Eastern Bluebird | Sialia sialis | Thrushes | 132 | May (past peak) |
| 35 | Turkey Vulture | Cathartes aura | New World Vultures | 131 | Apr (past peak) |
| 36 | Swamp Sparrow | Melospiza georgiana | New World Sparrows | 129 | May (past peak) |
| 37 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 129 | Apr (past peak) |
| 38 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 127 | Apr (past peak) |
| 39 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 113 | May (past peak) |
| 40 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 113 | May (past peak) |
| 41 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 113 | Sep (past peak) |
| 42 | Trumpeter Swan | Cygnus buccinator | Ducks, Geese, and Swans | 112 | Jun (past peak) |
| 43 | Tennessee Warbler | Leiothlypis peregrina | New World Warblers | 112 | Sep (past peak) |
| 44 | Brown Creeper | Certhia americana | Treecreepers | 111 | Apr (past peak) |
| 45 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 109 | Aug (past peak) |
| 46 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 97 | Sep (past peak) |
| 47 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 94 | Apr (past peak) |
| 48 | Hairy Woodpecker | Leuconotopicus villosus | Woodpeckers | 91 | May (past peak) |
| 49 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 90 | Jul (past peak) |
| 50 | Northern Flicker | Colaptes auratus | Woodpeckers | 76 | Apr (past peak) |