60 birds were recorded seen in New Jersey in January in our iNaturalist sample; 10 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in January

Dark-eyed Junco
Canada Goose

White-throated Sparrow

Northern Cardinal

Mallard

Song Sparrow
Bufflehead

Red-tailed Hawk

American Robin

Mourning Dove

Great Blue Heron

Bald Eagle
All birds seen in New Jersey in January
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 701 | Jan (peak) |
| 2 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 608 | Apr (rising) |
| 3 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 606 | Oct (rising) |
| 4 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 544 | Apr (rising) |
| 5 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 412 | Mar (rising) |
| 6 | Song Sparrow | Melospiza melodia | New World Sparrows | 409 | Mar (rising) |
| 7 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 346 | Mar (rising) |
| 8 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 339 | Mar (rising) |
| 9 | American Robin | Turdus migratorius | Thrushes | 333 | Apr (rising) |
| 10 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 326 | Apr (rising) |
| 11 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 326 | Sep (rising) |
| 12 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 315 | Oct (rising) |
| 13 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 313 | Apr (rising) |
| 14 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 311 | Mar (rising) |
| 15 | Hooded Merganser | Lophodytes cucullatus | Ducks, Geese, and Swans | 309 | Jan (peak) |
| 16 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 307 | May (rising) |
| 17 | American Herring Gull | Larus smithsonianus | Gulls, Terns, and Skimmers | 303 | Aug (rising) |
| 18 | Long-tailed Duck | Clangula hyemalis | Ducks, Geese, and Swans | 293 | Jan (peak) |
| 19 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 277 | May (rising) |
| 20 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 267 | Dec (rising) |
| 21 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 261 | Oct (rising) |
| 22 | American Black Duck | Anas rubripes | Ducks, Geese, and Swans | 253 | Jan (peak) |
| 23 | Brant | Branta bernicla | Ducks, Geese, and Swans | 251 | Mar (rising) |
| 24 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 250 | Apr (rising) |
| 25 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 213 | Apr (rising) |
| 26 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 211 | Jan (peak) |
| 27 | Red-breasted Merganser | Mergus serrator | Ducks, Geese, and Swans | 209 | Feb (rising) |
| 28 | Harlequin Duck | Histrionicus histrionicus | Ducks, Geese, and Swans | 203 | Jan (peak) |
| 29 | Sanderling | Calidris alba | Sandpipers and Allies | 197 | Aug (rising) |
| 30 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 197 | Mar (rising) |
| 31 | Turkey Vulture | Cathartes aura | New World Vultures | 189 | Mar (rising) |
| 32 | White-breasted Nuthatch | Sitta carolinensis | Nuthatches | 182 | Mar (rising) |
| 33 | European Starling | Sturnus vulgaris | Starlings | 182 | May (rising) |
| 34 | House Sparrow | Passer domesticus | Old World Sparrows | 173 | May (rising) |
| 35 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 172 | Jan (peak) |
| 36 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 164 | Jan (peak) |
| 37 | Carolina Wren | Thryothorus ludovicianus | Wrens | 155 | Apr (rising) |
| 38 | Common Loon | Gavia immer | Loons | 154 | Feb (rising) |
| 39 | Black Scoter | Melanitta americana | Ducks, Geese, and Swans | 153 | Jan (peak) |
| 40 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 153 | Dec (rising) |
| 41 | Eastern Bluebird | Sialia sialis | Thrushes | 146 | Apr (rising) |
| 42 | Mute Swan | Cygnus olor | Ducks, Geese, and Swans | 139 | Oct (rising) |
| 43 | Great Black-backed Gull | Larus marinus | Gulls, Terns, and Skimmers | 134 | Aug (rising) |
| 44 | Ring-necked Duck | Aythya collaris | Ducks, Geese, and Swans | 133 | Mar (rising) |
| 45 | Gadwall | Mareca strepera | Ducks, Geese, and Swans | 133 | Dec (rising) |
| 46 | Ruddy Duck | Oxyura jamaicensis | Ducks, Geese, and Swans | 126 | Nov (rising) |
| 47 | Purple Sandpiper | Calidris maritima | Sandpipers and Allies | 125 | Feb (rising) |
| 48 | Dunlin | Calidris alpina | Sandpipers and Allies | 120 | May (rising) |
| 49 | Surf Scoter | Melanitta perspicillata | Ducks, Geese, and Swans | 120 | Jan (peak) |
| 50 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 120 | Oct (rising) |