60 birds were recorded seen in Maryland in December in our iNaturalist sample; 0 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in December

White-throated Sparrow

Northern Cardinal

Ring-billed Gull

Dark-eyed Junco
Canada Goose

Bald Eagle

Great Blue Heron

Mallard

Red-shouldered Hawk
Eastern Bluebird
Downy Woodpecker

Song Sparrow
All birds seen in Maryland in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 965 | Jan (past peak) |
| 2 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 954 | Apr (past peak) |
| 3 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 890 | Jan (past peak) |
| 4 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 840 | Jan (past peak) |
| 5 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 827 | Apr (past peak) |
| 6 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 805 | Jan (past peak) |
| 7 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 765 | May (past peak) |
| 8 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 722 | Apr (past peak) |
| 9 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 712 | Jan (past peak) |
| 10 | Eastern Bluebird | Sialia sialis | Thrushes | 671 | Apr (past peak) |
| 11 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 667 | Jan (past peak) |
| 12 | Song Sparrow | Melospiza melodia | New World Sparrows | 632 | Jan (past peak) |
| 13 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 528 | Apr (past peak) |
| 14 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 525 | Feb (past peak) |
| 15 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 510 | Jan (past peak) |
| 16 | Carolina Wren | Thryothorus ludovicianus | Wrens | 502 | Apr (past peak) |
| 17 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 480 | Apr (past peak) |
| 18 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 431 | Apr (past peak) |
| 19 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 421 | Apr (past peak) |
| 20 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 379 | Apr (past peak) |
| 21 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 374 | Apr (past peak) |
| 22 | Ring-necked Duck | Aythya collaris | Ducks, Geese, and Swans | 372 | Feb (past peak) |
| 23 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 370 | Mar (past peak) |
| 24 | American Robin | Turdus migratorius | Thrushes | 363 | Apr (past peak) |
| 25 | Turkey Vulture | Cathartes aura | New World Vultures | 351 | Apr (past peak) |
| 26 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 350 | Apr (past peak) |
| 27 | Black Vulture | Coragyps atratus | New World Vultures | 341 | Apr (past peak) |
| 28 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 336 | Jan (past peak) |
| 29 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 326 | Mar (past peak) |
| 30 | House Sparrow | Passer domesticus | Old World Sparrows | 323 | Apr (past peak) |
| 31 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 323 | Apr (past peak) |
| 32 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 319 | Oct (past peak) |
| 33 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 311 | Apr (past peak) |
| 34 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 305 | Oct (past peak) |
| 35 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 304 | Apr (past peak) |
| 36 | Hermit Thrush | Catharus guttatus | Thrushes | 251 | Nov (past peak) |
| 37 | European Starling | Sturnus vulgaris | Starlings | 243 | Apr (past peak) |
| 38 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 237 | Jan (past peak) |
| 39 | Ruddy Duck | Oxyura jamaicensis | Ducks, Geese, and Swans | 235 | Jan (past peak) |
| 40 | Tundra Swan | Cygnus columbianus | Ducks, Geese, and Swans | 232 | Feb (past peak) |
| 41 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 232 | Feb (past peak) |
| 42 | Northern Flicker | Colaptes auratus | Woodpeckers | 206 | Apr (past peak) |
| 43 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 187 | May (past peak) |
| 44 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 186 | Oct (past peak) |
| 45 | Lesser Scaup | Aythya affinis | Ducks, Geese, and Swans | 165 | Feb (past peak) |
| 46 | Gadwall | Mareca strepera | Ducks, Geese, and Swans | 150 | Feb (past peak) |
| 47 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 149 | Apr (past peak) |
| 48 | American Black Duck | Anas rubripes | Ducks, Geese, and Swans | 148 | Feb (past peak) |
| 49 | Brown Creeper | Certhia americana | Treecreepers | 141 | Jan (past peak) |
| 50 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 135 | Apr (past peak) |