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 164 species on the list, with 161 on Plum Island.
| Snow Goose | Dunlin | American Kestrel | American Tree Sparrow |
| Brant | Purple Sandpiper | Merlin | Dark-eyed Junco |
| Canada Goose | Least Sandpiper | Peregrine Falcon | White-throated Sparrow |
| Mute Swan | Pectoral Sandpiper | Great Crested Flycatcher | Seaside Sparrow |
| Wood Duck | Short-billed Dowitcher | Eastern Kingbird | Savannah Sparrow |
| Blue-winged Teal | American Woodcock | Eastern Phoebe | Song Sparrow |
| Northern Shoveler | Lesser Yellowlegs | Blue-headed Vireo | Swamp Sparrow |
| Gadwall | Willet | Blue Jay | Eastern Towhee |
| Eurasian Wigeon | Greater Yellowlegs | American Crow | Eastern Meadowlark |
| American Wigeon | Dovekie | Fish Crow | Orchard Oriole |
| Mallard | Razorbill | Common Raven | Baltimore Oriole |
| American Black Duck | Bonaparte's Gull | Black-capped Chickadee | Red-winged Blackbird |
| Northern Pintail | Ring-billed Gull | Tufted Titmouse | Brown-headed Cowbird |
| Green-winged Teal | Herring Gull | Horned Lark | Rusty Blackbird |
| Redhead | Iceland Gull | Tree Swallow | Common Grackle |
| Ring-necked Duck | Glaucous Gull | Northern Rough-winged Swallow | Northern Waterthrush |
| Greater Scaup | Great Black-backed Gull | Purple Martin | Black-and-white Warbler |
| Lesser Scaup | Common Tern | Barn Swallow | Nashville Warbler |
| Common Eider | Red-throated Loon | Ruby-crowned Kinglet | Common Yellowthroat |
| Surf Scoter | Common Loon | Golden-crowned Kinglet | American Redstart |
| White-winged Scoter | Northern Gannet | Cedar Waxwing | Northern Parula |
| Black Scoter | Great Cormorant | White-breasted Nuthatch | Yellow Warbler |
| Long-tailed Duck | Double-crested Cormorant | Brown Creeper | Black-throated Blue Warbler |
| Bufflehead | American Bittern | Blue-gray Gnatcatcher | Palm Warbler |
| Common Goldeneye | Great Blue Heron | House Wren | Pine Warbler |
| Hooded Merganser | Great Egret | Winter Wren | Yellow-rumped Warbler |
| Common Merganser | Snowy Egret | Marsh Wren | Black-throated Green Warbler |
| Red-breasted Merganser | Green Heron | Carolina Wren | Wilson's Warbler |
| Ruddy Duck | Glossy Ibis | Gray Catbird | Northern Cardinal |
| Wild Turkey | Turkey Vulture | Brown Thrasher | |
| Pied-billed Grebe | Osprey | Northern Mockingbird | |
| Horned Grebe | Northern Harrier | European Starling | |
| Red-necked Grebe | Sharp-shinned Hawk | Veery | |
| Rock Pigeon | Cooper's Hawk | Hermit Thrush | |
| Mourning Dove | Bald Eagle | American Robin | |
| Chimney Swift | Red-tailed Hawk | House Sparrow | |
| King Rail | Rough-legged Hawk | House Finch | |
| Clapper Rail | Great Horned Owl | Purple Finch | |
| Virginia Rail | Barred Owl | Red Crossbill | |
| American Coot | Short-eared Owl | Pine Siskin | |
| Black-bellied Plover | Belted Kingfisher | American Goldfinch | |
| Killdeer | Red-bellied Woodpecker | Snow Bunting | |
| Semipalmated Plover | Yellow-bellied Sapsucker | Chipping Sparrow | |
| Piping Plover | Downy Woodpecker | Field Sparrow | |
| Sanderling | Northern Flicker | Fox Sparrow |