60 birds were recorded seen in New Jersey in December in our iNaturalist sample; 3 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in December
Canada Goose

Dark-eyed Junco

Northern Cardinal

Mallard

White-throated Sparrow

Great Blue Heron

Red-tailed Hawk

Ring-billed Gull
Bufflehead

House Sparrow

Dunlin
Downy Woodpecker
All birds seen in New Jersey in December
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 592 | Apr (past peak) |
| 2 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 493 | Jan (past peak) |
| 3 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 476 | Apr (past peak) |
| 4 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 468 | Mar (past peak) |
| 5 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 422 | Oct (past peak) |
| 6 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 368 | Sep (past peak) |
| 7 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 335 | Mar (past peak) |
| 8 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 321 | Dec (peak) |
| 9 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 307 | Mar (past peak) |
| 10 | House Sparrow | Passer domesticus | Old World Sparrows | 286 | May (past peak) |
| 11 | Dunlin | Calidris alpina | Sandpipers and Allies | 275 | May (past peak) |
| 12 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 262 | Mar (past peak) |
| 13 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 258 | Apr (past peak) |
| 14 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 254 | Oct (past peak) |
| 15 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 251 | Oct (past peak) |
| 16 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 240 | Jan (past peak) |
| 17 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 232 | May (past peak) |
| 18 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 228 | May (past peak) |
| 19 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 227 | Apr (past peak) |
| 20 | Song Sparrow | Melospiza melodia | New World Sparrows | 225 | Mar (past peak) |
| 21 | American Robin | Turdus migratorius | Thrushes | 217 | Apr (past peak) |
| 22 | Turkey Vulture | Cathartes aura | New World Vultures | 213 | Mar (past peak) |
| 23 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 213 | Apr (past peak) |
| 24 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 208 | Aug (past peak) |
| 25 | European Starling | Sturnus vulgaris | Starlings | 195 | May (past peak) |
| 26 | Brant | Branta bernicla | Ducks, Geese, and Swans | 176 | Mar (past peak) |
| 27 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 173 | Apr (past peak) |
| 28 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 168 | Dec (peak) |
| 29 | American Black Duck | Anas rubripes | Ducks, Geese, and Swans | 157 | Jan (past peak) |
| 30 | Gadwall | Mareca strepera | Ducks, Geese, and Swans | 156 | Dec (peak) |
| 31 | Sanderling | Calidris alba | Sandpipers and Allies | 150 | Aug (past peak) |
| 32 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 150 | Jan (past peak) |
| 33 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 147 | Mar (past peak) |
| 34 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 147 | Jan (past peak) |
| 35 | Eastern Bluebird | Sialia sialis | Thrushes | 146 | Apr (past peak) |
| 36 | Ruddy Duck | Oxyura jamaicensis | Ducks, Geese, and Swans | 145 | Nov (past peak) |
| 37 | Long-tailed Duck | Clangula hyemalis | Ducks, Geese, and Swans | 141 | Jan (past peak) |
| 38 | Harlequin Duck | Histrionicus histrionicus | Ducks, Geese, and Swans | 136 | Jan (past peak) |
| 39 | Carolina Wren | Thryothorus ludovicianus | Wrens | 131 | Apr (past peak) |
| 40 | Great Black-backed Gull | Larus marinus | Gulls, Terns, and Skimmers | 127 | Aug (past peak) |
| 41 | Common Loon | Gavia immer | Loons | 125 | Feb (past peak) |
| 42 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 121 | Jan (past peak) |
| 43 | Purple Sandpiper | Calidris maritima | Sandpipers and Allies | 119 | Feb (past peak) |
| 44 | Mute Swan | Cygnus olor | Ducks, Geese, and Swans | 114 | Oct (past peak) |
| 45 | Black-capped Chickadee | Poecile atricapillus | Tits, Chickadees, and Titmice | 108 | Mar (past peak) |
| 46 | Black Vulture | Coragyps atratus | New World Vultures | 104 | Mar (past peak) |
| 47 | Yellow-bellied Sapsucker | Sphyrapicus varius | Woodpeckers | 103 | Oct (past peak) |
| 48 | Ruddy Turnstone | Arenaria interpres | Sandpipers and Allies | 100 | May (past peak) |
| 49 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 99 | Oct (past peak) |
| 50 | Ring-necked Duck | Aythya collaris | Ducks, Geese, and Swans | 98 | Mar (past peak) |