60 birds were recorded seen in Oregon in December in our iNaturalist sample; 2 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

Mallard

Bald Eagle

Red-tailed Hawk
California Scrub-Jay

Great Blue Heron
Anna's Hummingbird
American Wigeon

Song Sparrow

Golden-crowned Sparrow
House Finch
Bufflehead
All birds seen in Oregon in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 976 | Jan (past peak) |
| 2 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 844 | Apr (past peak) |
| 3 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 762 | May (past peak) |
| 4 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 742 | Jan (past peak) |
| 5 | California Scrub-Jay | Aphelocoma californica | Crows, Jays, and Magpies | 591 | May (past peak) |
| 6 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 585 | May (past peak) |
| 7 | Anna's Hummingbird | Calypte anna | Hummingbirds | 552 | Mar (past peak) |
| 8 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 552 | Dec (peak) |
| 9 | Song Sparrow | Melospiza melodia | New World Sparrows | 538 | Mar (past peak) |
| 10 | Golden-crowned Sparrow | Zonotrichia atricapilla | New World Sparrows | 531 | Apr (past peak) |
| 11 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 523 | May (past peak) |
| 12 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 513 | Mar (past peak) |
| 13 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 447 | Mar (past peak) |
| 14 | Spotted Towhee | Pipilo maculatus | New World Sparrows | 441 | Apr (past peak) |
| 15 | American Robin | Turdus migratorius | Thrushes | 430 | May (past peak) |
| 16 | Northern Flicker | Colaptes auratus | Woodpeckers | 418 | Mar (past peak) |
| 17 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 412 | Mar (past peak) |
| 18 | California Quail | Callipepla californica | New World Quails | 405 | May (past peak) |
| 19 | American Kestrel | Falco sparverius | Falcons and Caracaras | 402 | Jan (past peak) |
| 20 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 359 | Apr (past peak) |
| 21 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 339 | Jan (past peak) |
| 22 | Pine Siskin | Spinus pinus | Finches, Euphonias, and Allies | 332 | Dec (peak) |
| 23 | Ruby-crowned Kinglet | Corthylio calendula | Kinglets | 331 | Jan (past peak) |
| 24 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 328 | Jan (past peak) |
| 25 | Varied Thrush | Ixoreus naevius | Thrushes | 300 | Jan (past peak) |
| 26 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 300 | Mar (past peak) |
| 27 | Ring-necked Duck | Aythya collaris | Ducks, Geese, and Swans | 284 | Mar (past peak) |
| 28 | Red-breasted Sapsucker | Sphyrapicus ruber | Woodpeckers | 283 | Mar (past peak) |
| 29 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 281 | Jan (past peak) |
| 30 | Bushtit | Psaltriparus minimus | Long-tailed Tits and Bushtits | 275 | Mar (past peak) |
| 31 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 271 | Jan (past peak) |
| 32 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 264 | Sep (past peak) |
| 33 | Steller's Jay | Cyanocitta stelleri | Crows, Jays, and Magpies | 261 | May (past peak) |
| 34 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 252 | Jan (past peak) |
| 35 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 252 | Jan (past peak) |
| 36 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 244 | Aug (past peak) |
| 37 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 234 | Apr (past peak) |
| 38 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 232 | Apr (past peak) |
| 39 | Red-breasted Nuthatch | Sitta canadensis | Nuthatches | 228 | Sep (past peak) |
| 40 | Lesser Goldfinch | Spinus psaltria | Finches, Euphonias, and Allies | 227 | May (past peak) |
| 41 | Western Gull | Larus occidentalis | Gulls, Terns, and Skimmers | 225 | Jul (past peak) |
| 42 | House Sparrow | Passer domesticus | Old World Sparrows | 222 | May (past peak) |
| 43 | Fox Sparrow | Passerella iliaca | New World Sparrows | 221 | Jan (past peak) |
| 44 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 213 | Sep (past peak) |
| 45 | Common Goldeneye | Bucephala clangula | Ducks, Geese, and Swans | 208 | Jan (past peak) |
| 46 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 205 | Mar (past peak) |
| 47 | European Starling | Sturnus vulgaris | Starlings | 201 | May (past peak) |
| 48 | Townsend's Warbler | Setophaga townsendi | New World Warblers | 201 | Jan (past peak) |
| 49 | Belted Kingfisher | Megaceryle alcyon | Kingfishers | 187 | Aug (past peak) |
| 50 | Cackling Goose | Branta hutchinsii | Ducks, Geese, and Swans | 184 | Oct (past peak) |