60 birds were recorded seen in Wisconsin in December in our iNaturalist sample; 4 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in December

Dark-eyed Junco

Black-capped Chickadee
Downy Woodpecker

Northern Cardinal

Blue Jay

Mallard
Canada Goose

Bald Eagle

House Sparrow
Red-bellied Woodpecker

American Goldfinch
White-breasted Nuthatch
All birds seen in Wisconsin in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 396 | Oct (past peak) |
| 2 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 390 | Apr (past peak) |
| 3 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 344 | Apr (past peak) |
| 4 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 334 | Apr (past peak) |
| 5 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 293 | May (past peak) |
| 6 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 260 | Apr (past peak) |
| 7 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 247 | May (past peak) |
| 8 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 239 | May (past peak) |
| 9 | House Sparrow | Passer domesticus | Old World Sparrows | 230 | May (past peak) |
| 10 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 210 | May (past peak) |
| 11 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 209 | May (past peak) |
| 12 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 200 | Apr (past peak) |
| 13 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 183 | May (past peak) |
| 14 | Tundra Swan | Cygnus columbianus | Ducks, Geese, and Swans | 174 | Dec (peak) |
| 15 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 171 | Sep (past peak) |
| 16 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 164 | May (past peak) |
| 17 | Common Goldeneye | Bucephala clangula | Ducks, Geese, and Swans | 148 | Jan (past peak) |
| 18 | European Starling | Sturnus vulgaris | Starlings | 148 | May (past peak) |
| 19 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 145 | Apr (past peak) |
| 20 | American Tree Sparrow | Spizelloides arborea | New World Sparrows | 144 | Mar (past peak) |
| 21 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 133 | Apr (past peak) |
| 22 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 118 | May (past peak) |
| 23 | Hairy Woodpecker | Leuconotopicus villosus | Woodpeckers | 118 | May (past peak) |
| 24 | American Robin | Turdus migratorius | Thrushes | 103 | Apr (past peak) |
| 25 | Pileated Woodpecker | Dryocopus pileatus | Woodpeckers | 94 | May (past peak) |
| 26 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 94 | Jul (past peak) |
| 27 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 91 | Apr (past peak) |
| 28 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 86 | Mar (past peak) |
| 29 | Red-breasted Merganser | Mergus serrator | Ducks, Geese, and Swans | 83 | Apr (past peak) |
| 30 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 75 | Sep (past peak) |
| 31 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 66 | Aug (past peak) |
| 32 | Trumpeter Swan | Cygnus buccinator | Ducks, Geese, and Swans | 63 | Jun (past peak) |
| 33 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 62 | Aug (past peak) |
| 34 | Great Horned Owl | Bubo virginianus | Typical Owls | 50 | Apr (past peak) |
| 35 | Snowy Owl | Bubo scandiacus | Typical Owls | 48 | Jan (past peak) |
| 36 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 47 | Apr (past peak) |
| 37 | Purple Finch | Haemorhous purpureus | Finches, Euphonias, and Allies | 45 | Apr (past peak) |
| 38 | Sandhill Crane | Antigone canadensis | Cranes | 44 | May (past peak) |
| 39 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 43 | Apr (past peak) |
| 40 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 42 | Apr (past peak) |
| 41 | Greater Scaup | Aythya marila | Ducks, Geese, and Swans | 41 | Feb (past peak) |
| 42 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 38 | Apr (past peak) |
| 43 | Townsend's Solitaire | Myadestes townsendi | Thrushes | 35 | Dec (peak) |
| 44 | Rough-legged Hawk | Buteo lagopus | Hawks, Eagles, and Kites | 33 | Jan (past peak) |
| 45 | Canvasback | Aythya valisineria | Ducks, Geese, and Swans | 32 | Mar (past peak) |
| 46 | Brown Creeper | Certhia americana | Treecreepers | 31 | Apr (past peak) |
| 47 | American Kestrel | Falco sparverius | Falcons and Caracaras | 30 | Apr (past peak) |
| 48 | Barred Owl | Strix varia | Typical Owls | 30 | May (past peak) |
| 49 | Long-tailed Duck | Clangula hyemalis | Ducks, Geese, and Swans | 29 | Dec (peak) |
| 50 | Pine Grosbeak | Pinicola enucleator | Finches, Euphonias, and Allies | 29 | Dec (peak) |