60 birds were recorded seen in Missouri in December in our iNaturalist sample; 8 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in December

Northern Cardinal

Bald Eagle

Dark-eyed Junco
Downy Woodpecker
Red-bellied Woodpecker

Red-tailed Hawk

White-throated Sparrow

Blue Jay
House Finch
Eastern Bluebird

Tufted Titmouse

Red-shouldered Hawk
All birds seen in Missouri in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 318 | Apr (past peak) |
| 2 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 264 | Jan (past peak) |
| 3 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 232 | Jan (past peak) |
| 4 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 230 | Mar (past peak) |
| 5 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 207 | Apr (past peak) |
| 6 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 198 | Nov (past peak) |
| 7 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 187 | Apr (past peak) |
| 8 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 173 | Apr (past peak) |
| 9 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 153 | Apr (past peak) |
| 10 | Eastern Bluebird | Sialia sialis | Thrushes | 152 | Apr (past peak) |
| 11 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 152 | Apr (past peak) |
| 12 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 150 | Mar (past peak) |
| 13 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 149 | Apr (past peak) |
| 14 | American Robin | Turdus migratorius | Thrushes | 143 | Apr (past peak) |
| 15 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 143 | Apr (past peak) |
| 16 | Northern Flicker | Colaptes auratus | Woodpeckers | 119 | Mar (past peak) |
| 17 | Trumpeter Swan | Cygnus buccinator | Ducks, Geese, and Swans | 118 | Dec (peak) |
| 18 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 117 | Apr (past peak) |
| 19 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 117 | Mar (past peak) |
| 20 | House Sparrow | Passer domesticus | Old World Sparrows | 107 | May (past peak) |
| 21 | Carolina Wren | Thryothorus ludovicianus | Wrens | 105 | Apr (past peak) |
| 22 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 103 | Apr (past peak) |
| 23 | European Starling | Sturnus vulgaris | Starlings | 94 | May (past peak) |
| 24 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 88 | Apr (past peak) |
| 25 | Song Sparrow | Melospiza melodia | New World Sparrows | 85 | Mar (past peak) |
| 26 | Barred Owl | Strix varia | Typical Owls | 83 | Apr (past peak) |
| 27 | Purple Finch | Haemorhous purpureus | Finches, Euphonias, and Allies | 80 | Jan (past peak) |
| 28 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 79 | Mar (past peak) |
| 29 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 78 | May (past peak) |
| 30 | American Tree Sparrow | Spizelloides arborea | New World Sparrows | 78 | Dec (peak) |
| 31 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 77 | Apr (past peak) |
| 32 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 76 | Sep (past peak) |
| 33 | Red-headed Woodpecker | Melanerpes erythrocephalus | Woodpeckers | 74 | May (past peak) |
| 34 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 72 | Oct (past peak) |
| 35 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 71 | Dec (peak) |
| 36 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 70 | May (past peak) |
| 37 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 61 | May (past peak) |
| 38 | Short-eared Owl | Asio flammeus | Typical Owls | 61 | Dec (peak) |
| 39 | American Kestrel | Falco sparverius | Falcons and Caracaras | 60 | Dec (peak) |
| 40 | Common Goldeneye | Bucephala clangula | Ducks, Geese, and Swans | 59 | Dec (peak) |
| 41 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 53 | Apr (past peak) |
| 42 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 50 | Jan (past peak) |
| 43 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 48 | Dec (peak) |
| 44 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 48 | May (past peak) |
| 45 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 47 | Apr (past peak) |
| 46 | Rusty Blackbird | Euphagus carolinus | New World Blackbirds and Orioles | 46 | Mar (past peak) |
| 47 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 46 | Nov (past peak) |
| 48 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 45 | Jan (past peak) |
| 49 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 44 | Mar (past peak) |
| 50 | Gadwall | Mareca strepera | Ducks, Geese, and Swans | 44 | Dec (peak) |