Guilford - 316 species |
| Ducks, Geese, & Swans - 33 species | | 1 Snow Goose | Anser caerulescens |
| | 2 Ross's Goose | Anser rossii |
| | 3 Greater White-fronted Goose | Anser albifrons |
| | 4 Cackling Goose | Branta hutchinsii |
| | 5 Canada Goose | Branta canadensis |
| | 6 Mute Swan | Cygnus olor |
| | 7 Tundra Swan | Cygnus columbianus |
| | 8 Wood Duck | Aix sponsa |
| | 9 Blue-winged Teal | Spatula discors |
| | 10 Northern Shoveler | Spatula clypeata |
| | 11 Gadwall | Mareca strepera |
| | 12 Eurasian Wigeon | Mareca penelope |
| | 13 American Wigeon | Mareca americana |
| | 14 Mallard | Anas platyrhynchos |
| | 15 American Black Duck | Anas rubripes |
| | 16 Northern Pintail | Anas acuta |
| | 17 Green-winged Teal | Anas crecca |
| | 18 Canvasback | Aythya valisineria |
| | 19 Redhead | Aythya americana |
| | 20 Ring-necked Duck | Aythya collaris |
| | 21 Greater Scaup | Aythya marila |
| | 22 Lesser Scaup | Aythya affinis |
| | 23 Harlequin Duck | Histrionicus histrionicus |
| | 24 Surf Scoter | Melanitta perspicillata |
| | 25 White-winged Scoter | Melanitta deglandi |
| | 26 Black Scoter | Melanitta americana |
| | 27 Long-tailed Duck | Clangula hyemalis |
| | 28 Bufflehead | Bucephala albeola |
| | 29 Common Goldeneye | Bucephala clangula |
| | 30 Hooded Merganser | Lophodytes cucullatus |
| | 31 Common Merganser | Mergus merganser |
| | 32 Red-breasted Merganser | Mergus serrator |
| | 33 Ruddy Duck | Oxyura jamaicensis |
| New World Quails - 1 species | | 34 Northern Bobwhite | Colinus virginianus |
| Grouse and Allies - 2 species | | 35 Wild Turkey | Meleagris gallopavo |
| | 36 Ruffed Grouse | Bonasa umbellus |
| Grebes - 5 species | | 37 Pied-billed Grebe | Podilymbus podiceps |
| | 38 Horned Grebe | Podiceps auritus |
| | 39 Red-necked Grebe | Podiceps grisegena |
| | 40 Eared Grebe | Podiceps nigricollis |
| | 41 Western Grebe | Aechmophorus occidentalis |
| Doves - 4 species | | 42 Rock Pigeon | Columba livia |
| | 43 Eurasian Collared-Dove | Streptopelia decaocto |
| | 44 Common Ground Dove | Columbina passerina |
| | 45 Mourning Dove | Zenaida macroura |
| Cuckoos & Anis - 2 species | | 46 Yellow-billed Cuckoo | Coccyzus americanus |
| | 47 Black-billed Cuckoo | Coccyzus erythropthalmus |
| Goatsuckers - 3 species | | 48 Common Nighthawk | Chordeiles minor |
| | 49 Chuck-will's-widow | Antrostomus carolinensis |
| | 50 Eastern Whip-poor-will | Antrostomus vociferus |
| Swifts - 1 species | | 51 Chimney Swift | Chaetura pelagica |
| Hummingbirds - 4 species | | 52 Ruby-throated Hummingbird | Archilochus colubris |
| | 53 Calliope Hummingbird | Selasphorus calliope |
| | 54 Rufous Hummingbird | Selasphorus rufus |
| | 55 Broad-tailed Hummingbird | Selasphorus platycercus |
| Rails, Gallinules, & Coots - 9 species | | 56 Clapper Rail | Rallus crepitans |
| | 57 King Rail | Rallus elegans |
| | 58 Virginia Rail | Rallus limicola |
| | 59 Sora | Porzana carolina |
| | 60 Common Gallinule | Gallinula galeata |
| | 61 American Coot | Fulica americana |
| | 62 Purple Gallinule | Porphyrio martinicus |
| | 63 Yellow Rail | Coturnicops noveboracensis |
| | 64 Black Rail | Laterallus jamaicensis |
| Cranes - 1 species | | 65 Sandhill Crane | Antigone canadensis |
| Stilts & Avocets - 2 species | | 66 Black-necked Stilt | Himantopus mexicanus |
| | 67 American Avocet | Recurvirostra americana |
| Plovers - 5 species | | 68 Black-bellied Plover | Pluvialis squatarola |
| | 69 American Golden-Plover | Pluvialis dominica |
| | 70 Killdeer | Charadrius vociferus |
| | 71 Semipalmated Plover | Charadrius semipalmatus |
| | 72 Piping Plover | Charadrius melodus |
| Sandpipers - 24 species | | 73 Upland Sandpiper | Bartramia longicauda |
| | 74 Whimbrel | Numenius phaeopus |
| | 75 Ruddy Turnstone | Arenaria interpres |
| | 76 Stilt Sandpiper | Calidris himantopus |
| | 77 Sanderling | Calidris alba |
| | 78 Dunlin | Calidris alpina |
| | 79 Baird's Sandpiper | Calidris bairdii |
| | 80 Least Sandpiper | Calidris minutilla |
| | 81 White-rumped Sandpiper | Calidris fuscicollis |
| | 82 Buff-breasted Sandpiper | Calidris subruficollis |
| | 83 Pectoral Sandpiper | Calidris melanotos |
| | 84 Semipalmated Sandpiper | Calidris pusilla |
| | 85 Western Sandpiper | Calidris mauri |
| | 86 Short-billed Dowitcher | Limnodromus griseus |
| | 87 Long-billed Dowitcher | Limnodromus scolopaceus |
| | 88 American Woodcock | Scolopax minor |
| | 89 Wilson's Snipe | Gallinago delicata |
| | 90 Spotted Sandpiper | Actitis macularius |
| | 91 Solitary Sandpiper | Tringa solitaria |
| | 92 Lesser Yellowlegs | Tringa flavipes |
| | 93 Willet | Tringa semipalmata |
| | 94 Greater Yellowlegs | Tringa melanoleuca |
| | 95 Red-necked Phalarope | Phalaropus lobatus |
| | 96 Red Phalarope | Phalaropus fulicarius |
| Skuas & Jaegers - 1 species | | 97 Pomarine Jaeger | Stercorarius pomarinus |
| Gulls & Terns - 16 species | | 98 Sabine's Gull | Xema sabini |
| | 99 Bonaparte's Gull | Chroicocephalus philadelphia |
| | 100 Laughing Gull | Leucophaeus atricilla |
| | 101 Franklin's Gull | Leucophaeus pipixcan |
| | 102 Ring-billed Gull | Larus delawarensis |
| | 103 American Herring Gull | Larus argentatus |
| | 104 Lesser Black-backed Gull | Larus fuscus |
| | 105 Glaucous Gull | Larus hyperboreus |
| | 106 Great Black-backed Gull | Larus marinus |
| | 107 Least Tern | Sternula antillarum |
| | 108 Caspian Tern | Hydroprogne caspia |
| | 109 Black Tern | Chlidonias niger |
| | 110 Common Tern | Sterna hirundo |
| | 111 Arctic Tern | Sterna paradisaea |
| | 112 Forster's Tern | Sterna forsteri |
| | 113 Royal Tern | Thalasseus maximus |
| Loons - 3 species | | 114 Red-throated Loon | Gavia stellata |
| | 115 Pacific Loon | Gavia pacifica |
| | 116 Common Loon | Gavia immer |
| Storks - 1 species | | 117 Wood Stork | Mycteria americana |
| Darters - 1 species | | 118 Anhinga | Anhinga anhinga |
| Cormorants - 2 species | | 119 Great Cormorant | Phalacrocorax carbo |
| | 120 Double-crested Cormorant | Nannopterum auritum |
| Pelicans - 2 species | | 121 American White Pelican | Pelecanus erythrorhynchos |
| | 122 Brown Pelican | Pelecanus occidentalis |
| Bitterns, Herons, & Allies - 11 species | | 123 American Bittern | Botaurus lentiginosus |
| | 124 Least Bittern | Botaurus exilis |
| | 125 Little Blue Heron | Egretta caerulea |
| | 126 Tricolored Heron | Egretta tricolor |
| | 127 Snowy Egret | Egretta thula |
| | 128 Yellow-crowned Night Heron | Nyctanassa violacea |
| | 129 Black-crowned Night Heron | Nycticorax nycticorax |
| | 130 Green Heron | Butorides virescens |
| | 131 Great Egret | Ardea alba |
| | 132 Western Cattle-Egret | Ardea ibis |
| | 133 Great Blue Heron | Ardea herodias |
| Ibises & Spoonbills - 4 species | | 134 White Ibis | Eudocimus albus |
| | 135 Glossy Ibis | Plegadis falcinellus |
| | 136 White-faced Ibis | Plegadis chihi |
| | 137 Roseate Spoonbill | Platalea ajaja |
| New World Vultures - 2 species | | 138 Black Vulture | Coragyps atratus |
| | 139 Turkey Vulture | Cathartes aura |
| Osprey - 1 species | | 140 Osprey | Pandion haliaetus |
| Kites, Eagles, & Hawks - 12 species | | 141 Swallow-tailed Kite | Elanoides forficatus |
| | 142 Golden Eagle | Aquila chrysaetos |
| | 143 Northern Harrier | Circus hudsonius |
| | 144 Sharp-shinned Hawk | Accipiter striatus |
| | 145 Cooper's Hawk | Accipiter cooperii |
| | 146 American Goshawk | Accipiter atricapillus |
| | 147 Bald Eagle | Haliaeetus leucocephalus |
| | 148 Mississippi Kite | Ictinia mississippiensis |
| | 149 Red-shouldered Hawk | Buteo lineatus |
| | 150 Broad-winged Hawk | Buteo platypterus |
| | 151 Red-tailed Hawk | Buteo jamaicensis |
| | 152 Rough-legged Hawk | Buteo lagopus |
| Barn-Owls - 1 species | | 153 American Barn Owl | Tyto alba |
| Owls - 7 species | | 154 Eastern Screech-Owl | Megascops asio |
| | 155 Great Horned Owl | Bubo virginianus |
| | 156 Snowy Owl | Bubo scandiacus |
| | 157 Barred Owl | Strix varia |
| | 158 Long-eared Owl | Asio otus |
| | 159 Short-eared Owl | Asio flammeus |
| | 160 Northern Saw-whet Owl | Aegolius acadicus |
| Kingfishers - 1 species | | 161 Belted Kingfisher | Megaceryle alcyon |
| Woodpeckers - 7 species | | 162 Red-headed Woodpecker | Melanerpes erythrocephalus |
| | 163 Red-bellied Woodpecker | Melanerpes carolinus |
| | 164 Yellow-bellied Sapsucker | Sphyrapicus varius |
| | 165 Downy Woodpecker | Dryobates pubescens |
| | 166 Hairy Woodpecker | Dryobates villosus |
| | 167 Northern Flicker | Colaptes auratus |
| | 168 Pileated Woodpecker | Dryocopus pileatus |
| Falcons - 3 species | | 169 American Kestrel | Falco sparverius |
| | 170 Merlin | Falco columbarius |
| | 171 Peregrine Falcon | Falco peregrinus |
| Tyrant Flycatchers - 12 species | | 172 Ash-throated Flycatcher | Myiarchus cinerascens |
| | 173 Great Crested Flycatcher | Myiarchus crinitus |
| | 174 Eastern Kingbird | Tyrannus tyrannus |
| | 175 Olive-sided Flycatcher | Contopus cooperi |
| | 176 Eastern Wood-Pewee | Contopus virens |
| | 177 Yellow-bellied Flycatcher | Empidonax flaviventris |
| | 178 Acadian Flycatcher | Empidonax virescens |
| | 179 Alder Flycatcher | Empidonax alnorum |
| | 180 Willow Flycatcher | Empidonax traillii |
| | 181 Least Flycatcher | Empidonax minimus |
| | 182 Eastern Phoebe | Sayornis phoebe |
| | 183 Say's Phoebe | Sayornis saya |
| Vireos - 6 species | | 184 White-eyed Vireo | Vireo griseus |
| | 185 Yellow-throated Vireo | Vireo flavifrons |
| | 186 Blue-headed Vireo | Vireo solitarius |
| | 187 Philadelphia Vireo | Vireo philadelphicus |
| | 188 Warbling Vireo | Vireo gilvus |
| | 189 Red-eyed Vireo | Vireo olivaceus |
| Shrikes - 1 species | | 190 Loggerhead Shrike | Lanius ludovicianus |
| Jays, Crows, & Ravens - 4 species | | 191 Blue Jay | Cyanocitta cristata |
| | 192 American Crow | Corvus brachyrhynchos |
| | 193 Fish Crow | Corvus ossifragus |
| | 194 Common Raven | Corvus corax |
| Chickadees & Titmice - 2 species | | 195 Carolina Chickadee | Poecile carolinensis |
| | 196 Tufted Titmouse | Baeolophus bicolor |
| Larks - 1 species | | 197 Horned Lark | Eremophila alpestris |
| Swallows - 6 species | | 198 Bank Swallow | Riparia riparia |
| | 199 Tree Swallow | Tachycineta bicolor |
| | 200 Northern Rough-winged Swallow | Stelgidopteryx serripennis |
| | 201 Purple Martin | Progne subis |
| | 202 Barn Swallow | Hirundo rustica |
| | 203 Cliff Swallow | Petrochelidon pyrrhonota |
| Kinglets - 2 species | | 204 Ruby-crowned Kinglet | Corthylio calendula |
| | 205 Golden-crowned Kinglet | Regulus satrapa |
| Waxwings - 1 species | | 206 Cedar Waxwing | Bombycilla cedrorum |
| Nuthatches - 3 species | | 207 Red-breasted Nuthatch | Sitta canadensis |
| | 208 White-breasted Nuthatch | Sitta carolinensis |
| | 209 Brown-headed Nuthatch | Sitta pusilla |
| Treecreepers - 1 species | | 210 Brown Creeper | Certhia americana |
| Gnatcatchers - 1 species | | 211 Blue-gray Gnatcatcher | Polioptila caerulea |
| Wrens - 6 species | | 212 Bewick's Wren | Thryomanes bewickii |
| | 213 Carolina Wren | Thryothorus ludovicianus |
| | 214 Northern House Wren | Troglodytes aedon |
| | 215 Winter Wren | Troglodytes hiemalis |
| | 216 Sedge Wren | Cistothorus stellaris |
| | 217 Marsh Wren | Cistothorus palustris |
| Mockingbirds & Thrashers - 3 species | | 218 Gray Catbird | Dumetella carolinensis |
| | 219 Brown Thrasher | Toxostoma rufum |
| | 220 Northern Mockingbird | Mimus polyglottos |
| Starlings - 1 species | | 221 European Starling | Sturnus vulgaris |
| Thrushes - 7 species | | 222 Eastern Bluebird | Sialia sialis |
| | 223 Veery | Catharus fuscescens |
| | 224 Gray-cheeked Thrush | Catharus minimus |
| | 225 Swainson's Thrush | Catharus ustulatus |
| | 226 Hermit Thrush | Catharus guttatus |
| | 227 Wood Thrush | Hylocichla mustelina |
| | 228 American Robin | Turdus migratorius |
| Old World Sparrows - 1 species | | 229 House Sparrow | Passer domesticus |
| Wagtails & Pipits - 1 species | | 230 American Pipit | Anthus rubescens |
| Cardueline Finches & Allies - 9 species | | 231 Evening Grosbeak | Coccothraustes vespertinus |
| | 232 Pine Grosbeak | Pinicola enucleator |
| | 233 House Finch | Haemorhous mexicanus |
| | 234 Purple Finch | Haemorhous purpureus |
| | 235 Redpoll | Acanthis flammea |
| | 236 Red Crossbill | Loxia curvirostra |
| | 237 White-winged Crossbill | Loxia leucoptera |
| | 238 Pine Siskin | Spinus pinus |
| | 239 American Goldfinch | Spinus tristis |
| Longspurs & Allies - 1 species | | 240 Lapland Longspur | Calcarius lapponicus |
| New World Sparrows & Allies - 18 species | | 241 Bachman's Sparrow | Peucaea aestivalis |
| | 242 Grasshopper Sparrow | Ammodramus savannarum |
| | 243 Lark Sparrow | Chondestes grammacus |
| | 244 Chipping Sparrow | Spizella passerina |
| | 245 Field Sparrow | Spizella pusilla |
| | 246 Fox Sparrow | Passerella iliaca |
| | 247 American Tree Sparrow | Spizelloides arborea |
| | 248 Dark-eyed Junco | Junco hyemalis |
| | 249 White-crowned Sparrow | Zonotrichia leucophrys |
| | 250 White-throated Sparrow | Zonotrichia albicollis |
| | 251 Vesper Sparrow | Pooecetes gramineus |
| | 252 Nelson's Sparrow | Ammospiza nelsoni |
| | 253 Henslow's Sparrow | Centronyx henslowii |
| | 254 Savannah Sparrow | Passerculus sandwichensis |
| | 255 Song Sparrow | Melospiza melodia |
| | 256 Lincoln's Sparrow | Melospiza lincolnii |
| | 257 Swamp Sparrow | Melospiza georgiana |
| | 258 Eastern Towhee | Pipilo erythrophthalmus |
| Yellow-breasted Chat - 1 species | | 259 Yellow-breasted Chat | Icteria virens |
| Blackbirds & Orioles - 9 species | | 260 Yellow-headed Blackbird | Xanthocephalus xanthocephalus |
| | 261 Bobolink | Dolichonyx oryzivorus |
| | 262 Eastern Meadowlark | Sturnella magna |
| | 263 Orchard Oriole | Icterus spurius |
| | 264 Baltimore Oriole | Icterus galbula |
| | 265 Red-winged Blackbird | Agelaius phoeniceus |
| | 266 Brown-headed Cowbird | Molothrus ater |
| | 267 Rusty Blackbird | Euphagus carolinus |
| | 268 Common Grackle | Quiscalus quiscula |
| Wood-Warblers - 37 species | | 269 Ovenbird | Seiurus aurocapilla |
| | 270 Worm-eating Warbler | Helmitheros vermivorum |
| | 271 Louisiana Waterthrush | Parkesia motacilla |
| | 272 Northern Waterthrush | Parkesia noveboracensis |
| | 273 Golden-winged Warbler | Vermivora chrysoptera |
| | 274 Blue-winged Warbler | Vermivora cyanoptera |
| | 275 Black-and-white Warbler | Mniotilta varia |
| | 276 Prothonotary Warbler | Protonotaria citrea |
| | 277 Swainson's Warbler | Limnothlypis swainsonii |
| | 278 Tennessee Warbler | Leiothlypis peregrina |
| | 279 Orange-crowned Warbler | Leiothlypis celata |
| | 280 Nashville Warbler | Leiothlypis ruficapilla |
| | 281 Connecticut Warbler | Oporornis agilis |
| | 282 Mourning Warbler | Geothlypis philadelphia |
| | 283 Kentucky Warbler | Geothlypis formosa |
| | 284 Common Yellowthroat | Geothlypis trichas |
| | 285 Hooded Warbler | Setophaga citrina |
| | 286 American Redstart | Setophaga ruticilla |
| | 287 Cape May Warbler | Setophaga tigrina |
| | 288 Cerulean Warbler | Setophaga cerulea |
| | 289 Northern Parula | Setophaga americana |
| | 290 Magnolia Warbler | Setophaga magnolia |
| | 291 Bay-breasted Warbler | Setophaga castanea |
| | 292 Blackburnian Warbler | Setophaga fusca |
| | 293 Yellow Warbler | Setophaga petechia |
| | 294 Chestnut-sided Warbler | Setophaga pensylvanica |
| | 295 Blackpoll Warbler | Setophaga striata |
| | 296 Black-throated Blue Warbler | Setophaga caerulescens |
| | 297 Palm Warbler | Setophaga palmarum |
| | 298 Pine Warbler | Setophaga pinus |
| | 299 Yellow-rumped Warbler | Setophaga coronata |
| | 300 Yellow-throated Warbler | Setophaga dominica |
| | 301 Prairie Warbler | Setophaga discolor |
| | 302 Black-throated Gray Warbler | Setophaga nigrescens |
| | 303 Black-throated Green Warbler | Setophaga virens |
| | 304 Canada Warbler | Cardellina canadensis |
| | 305 Wilson's Warbler | Cardellina pusilla |
| Cardinals, Grosbeaks, & Allies - 11 species | | 306 Summer Tanager | Piranga rubra |
| | 307 Scarlet Tanager | Piranga olivacea |
| | 308 Western Tanager | Piranga ludoviciana |
| | 309 Northern Cardinal | Cardinalis cardinalis |
| | 310 Rose-breasted Grosbeak | Pheucticus ludovicianus |
| | 311 Black-headed Grosbeak | Pheucticus melanocephalus |
| | 312 Blue Grosbeak | Passerina caerulea |
| | 313 Lazuli Bunting | Passerina amoena |
| | 314 Indigo Bunting | Passerina cyanea |
| | 315 Painted Bunting | Passerina ciris |
| | 316 Dickcissel | Spiza americana |
