60 birds were recorded seen in District of Columbia in October in our iNaturalist sample; 10 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in October

House Sparrow

Mallard

European Starling

Great Blue Heron

Northern Mockingbird

Great Egret

Yellow-rumped Warbler

Blue Jay

Mourning Dove

Cooper's Hawk

Double-crested Cormorant
Downy Woodpecker
All birds seen in District of Columbia in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | House Sparrow | Passer domesticus | Old World Sparrows | 299 | Apr (past peak) |
| 2 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 261 | Apr (past peak) |
| 3 | European Starling | Sturnus vulgaris | Starlings | 241 | Apr (past peak) |
| 4 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 153 | May (past peak) |
| 5 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 153 | Apr (past peak) |
| 6 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 116 | Sep (past peak) |
| 7 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 89 | Oct (peak) |
| 8 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 87 | Jun (past peak) |
| 9 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 84 | Apr (past peak) |
| 10 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 81 | Dec (rising) |
| 11 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 79 | Apr (past peak) |
| 12 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 76 | Mar (past peak) |
| 13 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 73 | Jan (past peak) |
| 14 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 68 | Apr (past peak) |
| 15 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 68 | Oct (peak) |
| 16 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 65 | Apr (past peak) |
| 17 | American Robin | Turdus migratorius | Thrushes | 59 | Apr (past peak) |
| 18 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 58 | Mar (past peak) |
| 19 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 58 | Oct (peak) |
| 20 | Song Sparrow | Melospiza melodia | New World Sparrows | 57 | Mar (past peak) |
| 21 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 50 | Oct (peak) |
| 22 | Palm Warbler | Setophaga palmarum | New World Warblers | 48 | Oct (peak) |
| 23 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 47 | May (past peak) |
| 24 | Northern Flicker | Colaptes auratus | Woodpeckers | 47 | Apr (past peak) |
| 25 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 44 | Sep (past peak) |
| 26 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 44 | Apr (past peak) |
| 27 | Carolina Wren | Thryothorus ludovicianus | Wrens | 42 | Apr (past peak) |
| 28 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 40 | Apr (past peak) |
| 29 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 36 | Feb (past peak) |
| 30 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 36 | Aug (past peak) |
| 31 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 30 | Mar (past peak) |
| 32 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 29 | Mar (past peak) |
| 33 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 28 | Jan (past peak) |
| 34 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 28 | Feb (past peak) |
| 35 | Black-throated Blue Warbler | Setophaga caerulescens | New World Warblers | 28 | Oct (peak) |
| 36 | Swamp Sparrow | Melospiza georgiana | New World Sparrows | 27 | Oct (peak) |
| 37 | Hermit Thrush | Catharus guttatus | Thrushes | 27 | Apr (past peak) |
| 38 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 27 | Jun (past peak) |
| 39 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 26 | Oct (peak) |
| 40 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 26 | Mar (past peak) |
| 41 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 25 | Apr (past peak) |
| 42 | Blackpoll Warbler | Setophaga striata | New World Warblers | 22 | May (past peak) |
| 43 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 21 | May (past peak) |
| 44 | Turkey Vulture | Cathartes aura | New World Vultures | 20 | Apr (past peak) |
| 45 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 20 | Mar (past peak) |
| 46 | Purple Finch | Haemorhous purpureus | Finches, Euphonias, and Allies | 20 | Oct (peak) |
| 47 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 19 | Jan (past peak) |
| 48 | Eastern Towhee | Pipilo erythrophthalmus | New World Sparrows | 18 | Apr (past peak) |
| 49 | Peregrine Falcon | Falco peregrinus | Falcons and Caracaras | 17 | Oct (peak) |
| 50 | Eastern Bluebird | Sialia sialis | Thrushes | 16 | Apr (past peak) |