60 birds were recorded seen in Maryland 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

Great Blue Heron

White-throated Sparrow

Bald Eagle

Song Sparrow

Ruby-crowned Kinglet
Eastern Phoebe
Canada Goose

Yellow-rumped Warbler

Mallard

Blue Jay

Northern Mockingbird

Turkey Vulture
All birds seen in Maryland in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 1,161 | May (past peak) |
| 2 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 1,139 | Jan (past peak) |
| 3 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 837 | Jan (past peak) |
| 4 | Song Sparrow | Melospiza melodia | New World Sparrows | 766 | Jan (past peak) |
| 5 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 758 | Oct (peak) |
| 6 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 697 | Oct (peak) |
| 7 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 629 | Apr (past peak) |
| 8 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 626 | Oct (peak) |
| 9 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 596 | Apr (past peak) |
| 10 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 577 | Apr (past peak) |
| 11 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 537 | Apr (past peak) |
| 12 | Turkey Vulture | Cathartes aura | New World Vultures | 518 | Apr (past peak) |
| 13 | Eastern Bluebird | Sialia sialis | Thrushes | 518 | Apr (past peak) |
| 14 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 505 | Apr (past peak) |
| 15 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 504 | Sep (past peak) |
| 16 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 475 | Apr (past peak) |
| 17 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 467 | Oct (peak) |
| 18 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 452 | Jan (past peak) |
| 19 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 444 | Jan (past peak) |
| 20 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 443 | May (past peak) |
| 21 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 437 | Apr (past peak) |
| 22 | Palm Warbler | Setophaga palmarum | New World Warblers | 436 | Oct (peak) |
| 23 | Swamp Sparrow | Melospiza georgiana | New World Sparrows | 401 | Oct (peak) |
| 24 | Northern Flicker | Colaptes auratus | Woodpeckers | 400 | Apr (past peak) |
| 25 | Chipping Sparrow | Spizella passerina | New World Sparrows | 373 | Apr (past peak) |
| 26 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 366 | Jan (past peak) |
| 27 | House Sparrow | Passer domesticus | Old World Sparrows | 362 | Apr (past peak) |
| 28 | Carolina Wren | Thryothorus ludovicianus | Wrens | 343 | Apr (past peak) |
| 29 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 337 | Oct (peak) |
| 30 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 332 | Apr (past peak) |
| 31 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 322 | Mar (past peak) |
| 32 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 312 | Apr (past peak) |
| 33 | Black Vulture | Coragyps atratus | New World Vultures | 299 | Apr (past peak) |
| 34 | Hermit Thrush | Catharus guttatus | Thrushes | 293 | Nov (rising) |
| 35 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 293 | May (past peak) |
| 36 | American Robin | Turdus migratorius | Thrushes | 292 | Apr (past peak) |
| 37 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 287 | Mar (past peak) |
| 38 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 286 | Apr (past peak) |
| 39 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 283 | Jan (past peak) |
| 40 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 274 | Oct (peak) |
| 41 | European Starling | Sturnus vulgaris | Starlings | 269 | Apr (past peak) |
| 42 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 252 | Apr (past peak) |
| 43 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 240 | Jan (past peak) |
| 44 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 223 | Aug (past peak) |
| 45 | Black-throated Blue Warbler | Setophaga caerulescens | New World Warblers | 216 | May (past peak) |
| 46 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 208 | Apr (past peak) |
| 47 | Blue-headed Vireo | Vireo solitarius | Vireos, Shrike-Babblers, and Erpornis | 207 | Oct (peak) |
| 48 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 203 | Apr (past peak) |
| 49 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 194 | Apr (past peak) |
| 50 | Savannah Sparrow | Passerculus sandwichensis | New World Sparrows | 188 | Oct (peak) |