Here’s the list of bird species seen by Tom in Massachusetts and on Plum Island in 2023. All birds on the list were seen in Massachusetts. Birds in boldface were also seen on Plum Island. There are 144 species on the list, with 141 on Plum Island.
| Snow Goose | Killdeer | Belted Kingfisher | American Goldfinch |
| Brant | Piping Plover | Red-bellied Woodpecker | Snow Bunting |
| Canada Goose | Sanderling | Yellow-bellied Sapsucker | Chipping Sparrow |
| Mute Swan | Dunlin | Downy Woodpecker | Field Sparrow |
| Wood Duck | Purple Sandpiper | Northern Flicker | Fox Sparrow |
| Blue-winged Teal | Pectoral Sandpiper | American Kestrel | American Tree Sparrow |
| Northern Shoveler | Short-billed Dowitcher | Merlin | Dark-eyed Junco |
| Gadwall | American Woodcock | Peregrine Falcon | White-throated Sparrow |
| Eurasian Wigeon | Lesser Yellowlegs | Eastern Phoebe | Seaside Sparrow |
| American Wigeon | Willet | Blue-headed Vireo | Savannah Sparrow |
| Mallard | Greater Yellowlegs | Blue Jay | Song Sparrow |
| American Black Duck | Dovekie | American Crow | Swamp Sparrow |
| Northern Pintail | Razorbill | Fish Crow | Eastern Towhee |
| Green-winged Teal | Bonaparte's Gull | Common Raven | Eastern Meadowlark |
| Redhead | Ring-billed Gull | Black-capped Chickadee | Red-winged Blackbird |
| Ring-necked Duck | Herring Gull | Tufted Titmouse | Brown-headed Cowbird |
| Greater Scaup | Iceland Gull | Horned Lark | Rusty Blackbird |
| Lesser Scaup | Glaucous Gull | Tree Swallow | Common Grackle |
| Common Eider | Great Black-backed Gull | Purple Martin | Black-and-white Warbler |
| Surf Scoter | Red-throated Loon | Barn Swallow | Common Yellowthroat |
| White-winged Scoter | Common Loon | Ruby-crowned Kinglet | Palm Warbler |
| Black Scoter | Northern Gannet | Golden-crowned Kinglet | Pine Warbler |
| Long-tailed Duck | Great Cormorant | Cedar Waxwing | Yellow-rumped Warbler |
| Bufflehead | Double-crested Cormorant | White-breasted Nuthatch | Northern Cardinal |
| Common Goldeneye | American Bittern | Brown Creeper | |
| Hooded Merganser | Great Blue Heron | Blue-gray Gnatcatcher | |
| Common Merganser | Great Egret | Winter Wren | |
| Red-breasted Merganser | Snowy Egret | Marsh Wren | |
| Ruddy Duck | Glossy Ibis | Carolina Wren | |
| Wild Turkey | Turkey Vulture | Gray Catbird | |
| Pied-billed Grebe | Osprey | Brown Thrasher | |
| Horned Grebe | Northern Harrier | Northern Mockingbird | |
| Red-necked Grebe | Sharp-shinned Hawk | European Starling | |
| Rock Pigeon | Cooper's Hawk | Hermit Thrush | |
| Mourning Dove | Bald Eagle | American Robin | |
| King Rail | Red-tailed Hawk | House Sparrow | |
| Clapper Rail | Rough-legged Hawk | House Finch | |
| Virginia Rail | Great Horned Owl | Purple Finch | |
| American Coot | Barred Owl | Red Crossbill | |
| Black-bellied Plover | Short-eared Owl | Pine Siskin |