60 birds were recorded seen in Wyoming 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

Bald Eagle
Trumpeter Swan

Common Raven
Black-billed Magpie

Barrow's Goldeneye
Golden Eagle

European Starling

Wild Turkey

Rough-legged Hawk

Townsend's Solitaire

Northern Flicker

Mallard
All birds seen in Wyoming in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 43 | Jul (past peak) |
| 2 | Trumpeter Swan | Cygnus buccinator | Ducks, Geese, and Swans | 28 | Sep (past peak) |
| 3 | Common Raven | Corvus corax | Crows, Jays, and Magpies | 27 | Jul (past peak) |
| 4 | Black-billed Magpie | Pica hudsonia | Crows, Jays, and Magpies | 25 | Jun (past peak) |
| 5 | Barrow's Goldeneye | Bucephala islandica | Ducks, Geese, and Swans | 16 | Jun (past peak) |
| 6 | Golden Eagle | Aquila chrysaetos | Hawks, Eagles, and Kites | 15 | Jul (past peak) |
| 7 | European Starling | Sturnus vulgaris | Starlings | 14 | Sep (past peak) |
| 8 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 13 | Sep (past peak) |
| 9 | Rough-legged Hawk | Buteo lagopus | Hawks, Eagles, and Kites | 13 | Jan (past peak) |
| 10 | Townsend's Solitaire | Myadestes townsendi | Thrushes | 12 | Jul (past peak) |
| 11 | Northern Flicker | Colaptes auratus | Woodpeckers | 12 | Jul (past peak) |
| 12 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 11 | Sep (past peak) |
| 13 | Mountain Chickadee | Poecile gambeli | Tits, Chickadees, and Titmice | 11 | Aug (past peak) |
| 14 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 10 | Aug (past peak) |
| 15 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 10 | Jul (past peak) |
| 16 | American Dipper | Cinclus mexicanus | Dippers | 10 | Aug (past peak) |
| 17 | House Sparrow | Passer domesticus | Old World Sparrows | 10 | Jul (past peak) |
| 18 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 10 | Jul (past peak) |
| 19 | Greater Sage-Grouse | Centrocercus urophasianus | Pheasants, Grouse, and Allies | 9 | Apr (past peak) |
| 20 | Hairy Woodpecker | Leuconotopicus villosus | Woodpeckers | 9 | Aug (past peak) |
| 21 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 8 | Apr (past peak) |
| 22 | Eurasian Collared-Dove | Streptopelia decaocto | Pigeons and Doves | 8 | Jul (past peak) |
| 23 | Common Goldeneye | Bucephala clangula | Ducks, Geese, and Swans | 8 | Feb (past peak) |
| 24 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 8 | May (past peak) |
| 25 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 7 | Jul (past peak) |
| 26 | Cedar Waxwing | Bombycilla cedrorum | Waxwings | 7 | Jul (past peak) |
| 27 | Clark's Nutcracker | Nucifraga columbiana | Crows, Jays, and Magpies | 7 | Aug (past peak) |
| 28 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 7 | Aug (past peak) |
| 29 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 7 | Sep (past peak) |
| 30 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 7 | Jun (past peak) |
| 31 | American Kestrel | Falco sparverius | Falcons and Caracaras | 6 | Aug (past peak) |
| 32 | Bohemian Waxwing | Bombycilla garrulus | Waxwings | 6 | Mar (past peak) |
| 33 | Steller's Jay | Cyanocitta stelleri | Crows, Jays, and Magpies | 6 | Jun (past peak) |
| 34 | Pine Grosbeak | Pinicola enucleator | Finches, Euphonias, and Allies | 6 | Jul (past peak) |
| 35 | Great Horned Owl | Bubo virginianus | Typical Owls | 6 | May (past peak) |
| 36 | American Goldfinch | Spinus tristis | Finches, Euphonias, and Allies | 6 | May (past peak) |
| 37 | Northern Shrike | Lanius borealis | Shrikes | 6 | Mar (past peak) |
| 38 | Ruffed Grouse | Bonasa umbellus | Pheasants, Grouse, and Allies | 5 | Sep (past peak) |
| 39 | Sharp-shinned Hawk | Accipiter striatus | Hawks, Eagles, and Kites | 5 | Sep (past peak) |
| 40 | Green-winged Teal | Anas crecca | Ducks, Geese, and Swans | 5 | May (past peak) |
| 41 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 5 | Feb (past peak) |
| 42 | Northern Pygmy-Owl | Glaucidium gnoma | Typical Owls | 5 | Jan (past peak) |
| 43 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 4 | Feb (past peak) |
| 44 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 4 | May (past peak) |
| 45 | Brown Creeper | Certhia americana | Treecreepers | 4 | Feb (past peak) |
| 46 | Canada Jay | Perisoreus canadensis | Crows, Jays, and Magpies | 4 | Sep (past peak) |
| 47 | Song Sparrow | Melospiza melodia | New World Sparrows | 4 | May (past peak) |
| 48 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 4 | Jul (past peak) |
| 49 | American Tree Sparrow | Spizelloides arborea | New World Sparrows | 4 | Feb (past peak) |
| 50 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 4 | Apr (past peak) |