60 birds were recorded seen in Pennsylvania in October in our iNaturalist sample; 11 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in October

White-throated Sparrow

Great Blue Heron

Yellow-rumped Warbler

Red-tailed Hawk

Song Sparrow

Blue Jay

Ruby-crowned Kinglet
Canada Goose

Mallard

American Robin

Northern Cardinal

House Sparrow
All birds seen in Pennsylvania in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 1,130 | Apr (past peak) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 1,108 | Aug (past peak) |
| 3 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 1,010 | Oct (peak) |
| 4 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 997 | Oct (peak) |
| 5 | Song Sparrow | Melospiza melodia | New World Sparrows | 855 | Apr (past peak) |
| 6 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 791 | May (past peak) |
| 7 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 710 | Oct (peak) |
| 8 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 673 | Apr (past peak) |
| 9 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 662 | Apr (past peak) |
| 10 | American Robin | Turdus migratorius | Thrushes | 644 | Apr (past peak) |
| 11 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 638 | Apr (past peak) |
| 12 | House Sparrow | Passer domesticus | Old World Sparrows | 616 | Apr (past peak) |
| 13 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 565 | Apr (past peak) |
| 14 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 560 | Apr (past peak) |
| 15 | Turkey Vulture | Cathartes aura | New World Vultures | 546 | Apr (past peak) |
| 16 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 541 | Apr (past peak) |
| 17 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 527 | Apr (past peak) |
| 18 | Palm Warbler | Setophaga palmarum | New World Warblers | 471 | Oct (peak) |
| 19 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 456 | Apr (past peak) |
| 20 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 454 | Apr (past peak) |
| 21 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 448 | Oct (peak) |
| 22 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 427 | Apr (past peak) |
| 23 | Eastern Bluebird | Sialia sialis | Thrushes | 403 | Apr (past peak) |
| 24 | Swamp Sparrow | Melospiza georgiana | New World Sparrows | 382 | Oct (peak) |
| 25 | European Starling | Sturnus vulgaris | Starlings | 365 | May (past peak) |
| 26 | Carolina Wren | Thryothorus ludovicianus | Wrens | 360 | Apr (past peak) |
| 27 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 359 | Jan (past peak) |
| 28 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 349 | Apr (past peak) |
| 29 | Eastern Phoebe | Sayornis phoebe | Tyrant Flycatchers | 348 | Apr (past peak) |
| 30 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 344 | Jan (past peak) |
| 31 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 337 | Apr (past peak) |
| 32 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 337 | Aug (past peak) |
| 33 | Golden-crowned Kinglet | Regulus satrapa | Kinglets | 324 | Oct (peak) |
| 34 | Common Yellowthroat | Geothlypis trichas | New World Warblers | 314 | May (past peak) |
| 35 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 294 | Aug (past peak) |
| 36 | Gray Catbird | Dumetella carolinensis | Mockingbirds and Thrashers | 293 | May (past peak) |
| 37 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 292 | Apr (past peak) |
| 38 | Hermit Thrush | Catharus guttatus | Thrushes | 261 | Apr (past peak) |
| 39 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 259 | Apr (past peak) |
| 40 | Northern Flicker | Colaptes auratus | Woodpeckers | 257 | Apr (past peak) |
| 41 | Sharp-shinned Hawk | Accipiter striatus | Hawks, Eagles, and Kites | 220 | Oct (peak) |
| 42 | Blackpoll Warbler | Setophaga striata | New World Warblers | 213 | Oct (peak) |
| 43 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 206 | Feb (past peak) |
| 44 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 188 | Apr (past peak) |
| 45 | Chipping Sparrow | Spizella passerina | New World Sparrows | 186 | Apr (past peak) |
| 46 | Brown Creeper | Certhia americana | Treecreepers | 184 | Oct (peak) |
| 47 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 174 | Apr (past peak) |
| 48 | Savannah Sparrow | Passerculus sandwichensis | New World Sparrows | 173 | Oct (peak) |
| 49 | Ovenbird | Seiurus aurocapilla | New World Warblers | 173 | May (past peak) |
| 50 | Wood Duck | Aix sponsa | Ducks, Geese, and Swans | 169 | Apr (past peak) |