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. Birds in yellow are Massachusetts life birds. Birds in purple are Plum Island life birds. There are 242 species on the list, with 239 on Plum Island, and 1 state life bird.
| Brant | Long-billed Dowitcher | Eastern Kingbird | Nelson's Sparrow |
| Canada Goose | American Woodcock | Olive-sided Flycatcher | Saltmarsh Sparrow |
| Mute Swan | Wilson's Snipe | Eastern Wood-Pewee | Savannah Sparrow |
| Wood Duck | Spotted Sandpiper | Yellow-bellied Flycatcher | Song Sparrow |
| Blue-winged Teal | Solitary Sandpiper | Alder Flycatcher | Lincoln's Sparrow |
| Northern Shoveler | Lesser Yellowlegs | Willow Flycatcher | Swamp Sparrow |
| Gadwall | Willet | Least Flycatcher | Eastern Towhee |
| American Wigeon | Greater Yellowlegs | Eastern Phoebe | Yellow-breasted Chat |
| Mallard | Wilson's Phalarope | White-eyed Vireo | Bobolink |
| American Black Duck | Red-necked Phalarope | Yellow-throated Vireo | Eastern Meadowlark |
| Northern Pintail | Red Phalarope | Blue-headed Vireo | Orchard Oriole |
| Green-winged Teal | Common Murre | Philadelphia Vireo | Baltimore Oriole |
| Ring-necked Duck | Razorbill | Warbling Vireo | Red-winged Blackbird |
| Greater Scaup | Black-legged Kittiwake | Red-eyed Vireo | Brown-headed Cowbird |
| Lesser Scaup | Bonaparte's Gull | Blue Jay | Rusty Blackbird |
| King Eider | Laughing Gull | American Crow | Common Grackle |
| Common Eider | Ring-billed Gull | Fish Crow | Ovenbird |
| Surf Scoter | Herring Gull | Common Raven | Northern Waterthrush |
| White-winged Scoter | Iceland Gull | Black-capped Chickadee | Blue-winged Warbler |
| Black Scoter | Lesser Black-backed Gull | Tufted Titmouse | Black-and-white Warbler |
| Long-tailed Duck | Great Black-backed Gull | Horned Lark | Tennessee Warbler |
| Bufflehead | Least Tern | Bank Swallow | Orange-crowned Warbler |
| Common Goldeneye | Roseate Tern | Tree Swallow | Nashville Warbler |
| Hooded Merganser | Common Tern | Northern Rough-winged Swallow | Mourning Warbler |
| Common Merganser | Forster's Tern | Purple Martin | Common Yellowthroat |
| Red-breasted Merganser | Red-throated Loon | Barn Swallow | American Redstart |
| Ruddy Duck | Common Loon | Ruby-crowned Kinglet | Cape May Warbler |
| Wild Turkey | Wilson's Storm-Petrel | Golden-crowned Kinglet | Northern Parula |
| Pied-billed Grebe | Northern Gannet | Bohemian Waxwing | Magnolia Warbler |
| Horned Grebe | Great Cormorant | Cedar Waxwing | Bay-breasted Warbler |
| Red-necked Grebe | Double-crested Cormorant | Red-breasted Nuthatch | Blackburnian Warbler |
| Rock Pigeon | American Bittern | White-breasted Nuthatch | Yellow Warbler |
| Mourning Dove | Least Bittern | Brown Creeper | Chestnut-sided Warbler |
| Yellow-billed Cuckoo | Great Blue Heron | Blue-gray Gnatcatcher | Blackpoll Warbler |
| Black-billed Cuckoo | Great Egret | House Wren | Black-throated Blue Warbler |
| Common Nighthawk | Snowy Egret | Winter Wren | Palm Warbler |
| Eastern Whip-poor-will | Green Heron | Marsh Wren | Pine Warbler |
| Chimney Swift | Black-crowned Night-Heron | Carolina Wren | Yellow-rumped Warbler |
| Ruby-throated Hummingbird | Yellow-crowned Night-Heron | Gray Catbird | Prairie Warbler |
| King Rail | Glossy Ibis | Brown Thrasher | Black-throated Green Warbler |
| Virginia Rail | Turkey Vulture | Northern Mockingbird | Canada Warbler |
| Sora | Osprey | European Starling | Wilson's Warbler |
| Common Gallinule | Northern Harrier | Eastern Bluebird | Summer Tanager |
| American Coot | Sharp-shinned Hawk | Veery | Scarlet Tanager |
| American Avocet | Cooper's Hawk | Swainson's Thrush | Northern Cardinal |
| Black-bellied Plover | Bald Eagle | Hermit Thrush | Rose-breasted Grosbeak |
| American Golden-Plover | Broad-winged Hawk | Wood Thrush | Dickcissel |
| Killdeer | Red-tailed Hawk | American Robin | |
| Semipalmated Plover | Rough-legged Hawk | House Sparrow | |
| Piping Plover | Barn Owl | American Pipit | |
| Whimbrel | Eastern Screech-Owl | House Finch | |
| Hudsonian Godwit | Great Horned Owl | Purple Finch | |
| Ruddy Turnstone | Snowy Owl | Red Crossbill | |
| Red Knot | Barred Owl | Pine Siskin | |
| Stilt Sandpiper | Short-eared Owl | American Goldfinch | |
| Sanderling | Belted Kingfisher | Snow Bunting | |
| Dunlin | Red-bellied Woodpecker | Lark Sparrow | |
| Purple Sandpiper | Yellow-bellied Sapsucker | Chipping Sparrow | |
| Baird's Sandpiper | Downy Woodpecker | Field Sparrow | |
| Least Sandpiper | Northern Flicker | Fox Sparrow | |
| White-rumped Sandpiper | Pileated Woodpecker | American Tree Sparrow | |
| Pectoral Sandpiper | American Kestrel | Dark-eyed Junco | |
| Semipalmated Sandpiper | Merlin | White-crowned Sparrow | |
| Western Sandpiper | Peregrine Falcon | White-throated Sparrow | |
| Short-billed Dowitcher | Great Crested Flycatcher | Seaside Sparrow |