60 birds were recorded seen in Washington 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

Great Blue Heron

American Crow

Dark-eyed Junco

Song Sparrow
American Wigeon

Northern Flicker
Canada Goose

American Robin

Steller's Jay

Bald Eagle

Double-crested Cormorant
All birds seen in Washington in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 1,422 | Apr (past peak) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 1,211 | May (past peak) |
| 3 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 1,079 | Apr (past peak) |
| 4 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 903 | May (past peak) |
| 5 | Song Sparrow | Melospiza melodia | New World Sparrows | 799 | Apr (past peak) |
| 6 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 730 | Mar (past peak) |
| 7 | Northern Flicker | Colaptes auratus | Woodpeckers | 715 | Jun (past peak) |
| 8 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 703 | Apr (past peak) |
| 9 | American Robin | Turdus migratorius | Thrushes | 670 | Apr (past peak) |
| 10 | Steller's Jay | Cyanocitta stelleri | Crows, Jays, and Magpies | 642 | May (past peak) |
| 11 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 615 | Apr (past peak) |
| 12 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 547 | Jan (past peak) |
| 13 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 466 | Mar (past peak) |
| 14 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 446 | Apr (past peak) |
| 15 | Barred Owl | Strix varia | Typical Owls | 417 | Jul (past peak) |
| 16 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 417 | May (past peak) |
| 17 | Anna's Hummingbird | Calypte anna | Hummingbirds | 401 | Apr (past peak) |
| 18 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 397 | Aug (past peak) |
| 19 | Golden-crowned Sparrow | Zonotrichia atricapilla | New World Sparrows | 379 | Apr (past peak) |
| 20 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 372 | Jun (past peak) |
| 21 | Short-billed Gull | Larus brachyrhynchus | Gulls, Terns, and Skimmers | 369 | Oct (peak) |
| 22 | Spotted Towhee | Pipilo maculatus | New World Sparrows | 364 | Apr (past peak) |
| 23 | Canada Jay | Perisoreus canadensis | Crows, Jays, and Magpies | 360 | Aug (past peak) |
| 24 | Surf Scoter | Melanitta perspicillata | Ducks, Geese, and Swans | 358 | Jan (past peak) |
| 25 | Gadwall | Mareca strepera | Ducks, Geese, and Swans | 342 | May (past peak) |
| 26 | Horned Grebe | Podiceps auritus | Grebes | 329 | Jan (past peak) |
| 27 | European Starling | Sturnus vulgaris | Starlings | 321 | May (past peak) |
| 28 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 312 | Mar (past peak) |
| 29 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 310 | Apr (past peak) |
| 30 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 308 | Apr (past peak) |
| 31 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 307 | Aug (past peak) |
| 32 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 305 | Sep (past peak) |
| 33 | California Gull | Larus californicus | Gulls, Terns, and Skimmers | 305 | Aug (past peak) |
| 34 | Common Loon | Gavia immer | Loons | 291 | Apr (past peak) |
| 35 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 287 | Mar (past peak) |
| 36 | Varied Thrush | Ixoreus naevius | Thrushes | 277 | Jan (past peak) |
| 37 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 263 | Mar (past peak) |
| 38 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 262 | Aug (past peak) |
| 39 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 260 | Apr (past peak) |
| 40 | Chestnut-backed Chickadee | Poecile rufescens | Tits, Chickadees, and Titmice | 249 | Apr (past peak) |
| 41 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 248 | Jan (past peak) |
| 42 | Pelagic Cormorant | Urile pelagicus | Cormorants and Shags | 239 | Jul (past peak) |
| 43 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 236 | May (past peak) |
| 44 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 234 | Mar (past peak) |
| 45 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 229 | Jan (past peak) |
| 46 | Heermann's Gull | Larus heermanni | Gulls, Terns, and Skimmers | 225 | Sep (past peak) |
| 47 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 225 | Jun (past peak) |
| 48 | Cackling Goose | Branta hutchinsii | Ducks, Geese, and Swans | 225 | Nov (rising) |
| 49 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 215 | Jan (past peak) |
| 50 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 214 | Jan (past peak) |