- Accipiter bicolor [bicolor Group] (Bicolored Hawk (Bicolored))
- Accipiter bicolor [guttifer Group] (Bicolored Hawk (Spotted))
- Accipiter bicolor chilensis (Bicolored Hawk (Chilean))
- Accipiter striatus [chinogaster Group] (Sharp-shinned Hawk (White-breasted))
- Accipiter striatus [striatus Group] (Sharp-shinned Hawk (Caribbean))
- Accipiter striatus [velox Group] (Sharp-shinned Hawk (Northern))
- Accipiter striatus erythronemius (Sharp-shinned Hawk (Rufous-thighed))
- Accipiter striatus ventralis (Sharp-shinned Hawk (Plain-breasted))
- Agelaius phoeniceus [californicusGroup] (Red-winged Blackbird (California Bicolored))
- Agelaius phoeniceus [phoeniceus Group] (Red-winged Blackbird (Red-winged))
- Agelaius phoeniceus gubernator (Red-winged Blackbird (Mexican Bicolored))
- Alauda arvensis [arvensis Group] (Sky Lark (European))
- Alauda arvensis [japonica Group] (Sky Lark (Asian))
- Amazilia amazilia [amazilia Group] (Amazilia Hummingbird (Amazilia))
- Amazilia amazilia alticola (Amazilia Hummingbird (Loja))
- Amazilia rutila [rutila Group] (Cinnamon Hummingbird (Mainland))
- Amazilia tzacatl [tzacatl Group] (Rufous-tailed Hummingbird (Rufous-tailed))
- Amazilia tzacatl handleyi (Rufous-tailed Hummingbird (Escudo))
- Amazilia versicolor [versicolor Group] (Versicolored Emerald (Versicolored))
- Amazilia versicolor rondoniae (Versicolored Emerald (Rondonia))
- Amazilia viridifrons viridifrons (Green-fronted Hummingbird (Green-fronted))
- Amazilia viridifrons wagneri (Green-fronted Hummingbird (Cinnamon-sided))
- Amazilia viridigaster [cupreicauda Group] (Green-bellied Hummingbird (Copper-tailed))
- Amazilia viridigaster [viridigaster Group] (Green-bellied Hummingbird (Green-bellied))
- Amazilia yucatanensis [chalconata Group] (Buff-bellied Hummingbird (Northern))
- Amazilia yucatanensis yucatanensis (Buff-bellied Hummingbird (Yucatan))
- Amazona leucocephala bahamensis (Cuban Parrot (Bahamas))
- Amazona leucocephala caymanensis/hesterna (Cuban Parrot (Cayman Is.))
- Amazona leucocephala leucocephala (Cuban Parrot (Cuba))
- Amazona oratrix [oratrix Group] (Yellow-headed Parrot (Mainland))
- Amazona oratrix tresmariae (Yellow-headed Parrot (Tres Marias Is.))
- Ammodramus maritimus [sennetti Group] (Seaside Sparrow (Gulf of Mexico))
- Ammodramus maritimus mirabilis (Seaside Sparrow (Cape Sable))
- Ammodramus maritimus nigrescens (Seaside Sparrow (Dusky))
- Ammodramus nelsoni subvirgatus (Nelson’s Sharp-tailed Sparrow (Atlantic Coast))
- Ammodramus savannarum floridanus (Grasshopper Sparrow (Florida))
- Ammodramus savannarum pratensis (Grasshopper Sparrow (Eastern))
- Amphispiza belli belli (Sage Sparrow (Bell’s))
- Amphispiza belli cinerea (Sage Sparrow (Gray))
- Amphispiza belli clementeae (Sage Sparrow (San Clemente))
- Amphispiza belli nevadensis (Sage Sparrow (Interior))
- Anas bahamensis bahamensis/rubrirostris (White-cheeked Pintail (White-cheeked))
- Anas bahamensis galapagensis (White-cheeked Pintail (Galapagos))
- Anas crecca carolinensis (Green-winged Teal (American))
- Anas crecca crecca/nimia (Green-winged Teal (Eurasian))
- Anas flavirostris flavirostris (Speckled Teal (flavirostris))
- Anas flavirostris oxyptera (Speckled Teal (oxyptera))
- Anas fulvigula fulvigula (Mottled Duck (Southeast))
- Anas fulvigula maculosa (Mottled Duck (Gulf coast))
- Anas platyrhynchos diazi (Mallard (Mexican))
- Anas platyrhynchos platyrhynchos/conboschas (Mallard (Northern))
- Anhinga melanogaster melanogaster (Darter (Oriental))
- Anhinga melanogaster novaehollandiae (Darter (Australasian))
- Anhinga melanogaster rufa (Darter (African))
- Anous minutus americanus (Black Noddy (Caribbean))
- Anous minutus melanogenys (Black Noddy (Hawaiian))
- Anser albifrons elgasi (Greater White-fronted Goose (Tule))
- Anser albifrons flavirostris (Greater White-fronted Goose (Greenland))
- Anthus correndera [correndera Group] (Correndera Pipit (Correndera))
- Anthus correndera grayi (Correndera Pipit (Falklands))
- Anthus rubescens alticola (American Pipit (Western montane))
- Anthus rubescens rubescens/pacificus (American Pipit (American))
- Aphelocoma californica [californica Group] (Western Scrub-Jay (Coastal))
- Aphelocoma californica [woodhouseii Group] (Western Scrub-Jay (Woodhouse’s))
- Aphelocoma ultramarina [arizonae Group] (Mexican Jay (Western))
- Aphelocoma ultramarina [couchii Group] (Mexican Jay (Eastern))
- Aratinga holochlora brevipes (Green Parakeet (Socorro))
- Aratinga holochlora holochlora/brewsteri (Green Parakeet (Green))
- Aratinga holochlora rubritorquis (Green Parakeet (Red-throated))
- Aratinga mitrata alticola (Mitred Parakeet (Chapman’s))
- Ardea alba alba (Great Egret (Eurasian))
- Ardea alba egretta (Great Egret (American))
- Ardea alba modesta (Great Egret (Australasian))
- Ardea herodias [herodias Group] (Great Blue Heron (Blue form))
- Ardea herodias occidentalis (Great Blue Heron (White form))
- Arremon brunneinucha [brunneinucha Group] (Chestnut-capped Brush-Finch (Chestnut-capped))
- Asio flammeus [domingensis Group] (Short-eared Owl (Antillean))
- Asio flammeus flammeus (Short-eared Owl (flammeus))
- Asio flammeus galapagoensis (Short-eared Owl (Galapagos))
- Asio flammeus sandwichensis (Short-eared Owl (Hawaiian))
- Asthenes dorbignyi arequipae (Creamy-breasted Canastero (Dark-winged))
- Athene cunicularia floridana (Burrowing Owl (Florida))
- Athene cunicularia hypugaea (Burrowing Owl (Western))
- Atlapetes leucopterus [leucopterus Group] (White-winged Brush-Finch (White-winged))
- Aulacorhynchus prasinus [albivitta Group] (Emerald Toucanet (Andean))
- Aulacorhynchus prasinus [atrogularis Group] (Emerald Toucanet (Black-throated))
- Aulacorhynchus prasinus [prasinus Group] (Emerald Toucanet (Emerald))
- Aulacorhynchus prasinus cognatus (Emerald Toucanet (Violet-throated))
- Aulacorhynchus prasinus lautus (Emerald Toucanet (Santa Marta))
- Aulacorhynchus prasinus wagleri (Emerald Toucanet (Wagler’s))
- Automolus ochrolaemus hypophaeus (Buff-throated Foliage-gleaner (hypophaeus))
- Automolus ochrolaemus pallidigularis (Buff-throated Foliage-gleaner (pallidigularis))
- Basileuterus chrysogaster chlorophrys (Golden-bellied Warbler (Choco))
- Basileuterus chrysogaster chrysogaster (Golden-bellied Warbler (Golden-bellied))
- Basileuterus rufifrons [delattrii Group] (Rufous-capped Warbler (Chestnut-capped))
- Basileuterus rufifrons [rufifrons Group] (Rufous-capped Warbler (North Mexico))
- Basileuterus rufifrons salvini (Rufous-capped Warbler (Salvin’s))
- Branta bernicla bernicla (Brant (Dark-bellied))
- Branta bernicla hrota (Brant (Atlantic))
- Branta bernicla nigricans (Brant (Black))
- Branta canadensis canadensis/interior (Canada Goose (Medium))
- Branta canadensis maxima (Canada Goose (Giant))
- Branta canadensis moffitti (Canada Goose (Large))
- Branta canadensis occidentalis/fulva (Canada Goose (Dusky))
- Branta canadensis parvipes (Canada Goose (Lesser))
- Branta hutchinsii hutchinsii (Cackling Goose (Richardson’s))
- Branta hutchinsii leucopareia (Cackling Goose (Aleutian))
- Branta hutchinsii minima (Cackling Goose (minima))
- Branta hutchinsii taverneri (Cackling Goose (Taverner’s))
- Bubo virginianus [virginianus Group] (Great Horned Owl (Great Horned))
- Bubo virginianus magellanicus (Great Horned Owl (Magellanic))
- Bubulcus ibis coromandus (Cattle Egret (Asian))
- Bubulcus ibis ibis (Cattle Egret (ibis))
- Buteo jamaicensis borealis (Red-tailed Hawk (Eastern))
- Buteo jamaicensis calurus (Red-tailed Hawk (Western))
- Buteo jamaicensis costaricensis (Red-tailed Hawk (Costa Rican))
- Buteo jamaicensis fuertesi (Red-tailed Hawk (Fuertes’s))
- Buteo jamaicensis harlani (Red-tailed Hawk (Harlan’s))
- Buteo jamaicensis jamaicensis (Red-tailed Hawk (jamaicensis))
- Buteo jamaicensis kriderii (Red-tailed Hawk (Krider’s))
- Buteo jamaicensis solitudinis (Red-tailed Hawk (solitudinis))
- Buteo lineatus alleni/texanus (Red-shouldered Hawk (Gulf Coast/Texas))
- Buteo lineatus elegans (Red-shouldered Hawk (California))
- Buteo lineatus extimus (Red-shouldered Hawk (South Florida))
- Buteo lineatus lineatus (Red-shouldered Hawk (Eastern))
- Buteo magnirostris [magnirostris Group] (Roadside Hawk (Mainland))
- Buteo magnirostris gracilis (Roadside Hawk (Cozumel I.))
- Buteo nitidus [nitidus Group] (Gray Hawk (Gray-lined))
- Buteo platypterus [brunnescens Group] (Broad-winged Hawk (Caribbean))
- Buteo platypterus platypterus (Broad-winged Hawk (Northern))
- Buteogallus anthracinus [subtilis Group] (Common Black-Hawk (Mangrove))
- Butorides virescens anthonyi (Green Heron (Western))
- Butorides virescens frazari (Green Heron (South Baja))
- Butorides virescens virescens (Green Heron (Eastern))
- Cacicus cela cela (Yellow-rumped Cacique (Amazonian))
- Cacicus chrysonotus chrysonotus (Mountain Cacique (Bolivian))
- Calidris alpina arctica (Dunlin (Greenland))
- Calidris alpina hudsonia (Dunlin (Eastern))
- Calidris ptilocnemis couesi (Rock Sandpiper (Pacific Coast))
- Calidris ptilocnemis ptilocnemis (Rock Sandpiper (Pribilof Is.))
- Calidris ptilocnemis tschuktschorum (Rock Sandpiper (Bering Sea Is.))
- Callaeas cinereus cinereus (Kokako (South Island))
- Callaeas cinereus wilsoni (Kokako (North Island))
- Calonectris diomedea borealis (Cory’s Shearwater (borealis))
- Calonectris diomedea diomedea (Cory’s Shearwater (Scopoli’s))
- Camptostoma obsoletum [obsoletum Group] (Southern Beardless-Tyrannulet (Southern))
- Camptostoma obsoletum [pusillus Group] (Southern Beardless-Tyrannulet (Northern))
- Campylorhynchus rufinucha [capistratus Group] (Rufous-naped Wren (Guatemalan))
- Campylorhynchus rufinucha [humilis Group] (Rufous-naped Wren (West Mexico))
- Campylorhynchus rufinucha rufinucha (Rufous-naped Wren (Veracruz))
- Caprimulgus cubanensis ekmani (Greater Antillean Nightjar (Hispaniolan))
- Caprimulgus longirostris [longirostris Group] (Band-winged Nightjar (Band-winged))
- Caprimulgus longirostris decussatus (Band-winged Nightjar (decussatus))
- Caprimulgus rufus [rufus Group] (Rufous Nightjar (South American))
- Caprimulgus rufus minimus (Rufous Nightjar (Northern))
- Caprimulgus rufus otiosus (Rufous Nightjar (St. Lucia))
- Caprimulgus vociferus [arizonae Group] (Whip-poor-will (Mexican))
- Caprimulgus vociferus vociferus (Whip-poor-will (Eastern))
- Carduelis flammea flammea (Common Redpoll (flammea))
- Carduelis flammea rostrata (Common Redpoll (rostrata))
- Carduelis hornemanni exilipes (Hoary Redpoll (exilipes))
- Carduelis hornemanni hornemanni (Hoary Redpoll (hornemanni))
- Carduelis pinus pinus/macroptera (Pine Siskin (Northern))
- Carpodacus purpureus californicus (Purple Finch (Western))
- Carpodacus purpureus purpureus (Purple Finch (Eastern))
- Cathartes aura aura/septentrionalis (Turkey Vulture (Northern))
- Cathartes aura ruficollis (Turkey Vulture (Tropical))
- Catharus aurantiirostris [aurantiirostris Group] (Orange-billed Nightingale-Thrush (Orange-billed))
- Catharus aurantiirostris [griseiceps Group] (Orange-billed Nightingale-Thrush (Gray-headed))
- Catharus fuscater [fuscater Group] (Slaty-backed Nightingale-Thrush (Southern))
- Catharus fuscater hellmayri (Slaty-backed Nightingale-Thrush (Northern))
- Catharus guttatus [auduboni Group] (Hermit Thrush (Western mountains))
- Catharus guttatus [faxoni Group] (Hermit Thrush (Northern/Eastern))
- Catharus guttatus [guttatus Group] (Hermit Thrush (Western lowlands))
- Catharus ustulatus [ustulatus Group] (Swainson’s Thrush (Russet-backed))
- Catharus ustulatus swainsoni (Swainson’s Thrush (Olive-backed))
- Cepphus columba [columba Group] (Pigeon Guillemot (North Pacific))
- Cepphus grylle arcticus (Black Guillemot (Subarctic))
- Cepphus grylle mandtii (Black Guillemot (Arctic))
- Cercomacra nigrescens [nigrescens Group] (Blackish Antbird (Blackish))
- Cercomacra nigrescens fuscicauda (Blackish Antbird (fuscicauda))
- Chaetura brachyura [brachyura Group] (Short-tailed Swift (Short-tailed))
- Chaetura brachyura ocypetes (Short-tailed Swift (Tumbes))
- Chasiempis sandwichensis bryani (Elepaio (Hawaii, Mauna Kea))
- Chasiempis sandwichensis gayi (Elepaio (Oahu))
- Chasiempis sandwichensis ridgwayi (Elepaio (Hawaii, Hilo coast))
- Chasiempis sandwichensis sandwichensis (Elepaio (Hawaii, Kona coast))
- Chasiempis sandwichensis sclateri (Elepaio (Kauai))
- Chlidonias niger niger (Black Tern (Eurasian))
- Chlidonias niger surinamensis (Black Tern (North American))
- Chloephaga picta leucoptera (Upland Goose (Bar-breasted))
- Chloephaga picta picta (Upland Goose (White-breasted))
- Chlorospingus ophthalmicus [flavopectus Group] (Common Bush-Tanager (Northern Andes))
- Chlorospingus ophthalmicus [postocularis Group] (Common Bush-Tanager (Middle America))
- Chlorospingus ophthalmicus [venezuelanus Group] (Common Bush-Tanager (Venezuela))
- Chlorospingus ophthalmicus bolivianus (Common Bush-Tanager (Northern Bolivia))
- Chlorospingus ophthalmicus cinereocephalus (Common Bush-Tanager (cinereocephalus))
- Chlorospingus ophthalmicus ophthalmicus (Common Bush-Tanager (Northeast Mexico))
- Chlorospingus ophthalmicus peruvianus (Common Bush-Tanager (Southern Peru))
- Chlorospingus ophthalmicus punctulatus (Common Bush-Tanager (Central Panama))
- Chlorostilbon canivetii canivetii (Canivet’s Emerald (Canivet’s))
- Cinclus mexicanus [mexicanus Group] (American Dipper (Northern))
- Cinclus mexicanus ardesiacus (American Dipper (Costa Rican))
- Circus cyaneus cyaneus (Northern Harrier (Eurasian))
- Circus cyaneus hudsonius (Northern Harrier (American))
- Cistothorus palustris [paludicola Group] (Marsh Wren (Coastal Pacific))
- Cistothorus palustris [palustris Group] (Marsh Wren (Eastern))
- Cistothorus palustris [plesius Group] (Marsh Wren (Interior West))
- Cistothorus platensis [platensis Group] (Sedge Wren (platensis Group))
- Cistothorus platensis [polyglottus Group] (Sedge Wren (polyglottus Group))
- Cistothorus platensis [tinnulus Group] (Sedge Wren (Middle America))
- Cistothorus platensis falklandicus (Sedge Wren (Falklands))
- Cistothorus platensis stellaris (Sedge Wren (Northern))
- Cnemoscopus rubrirostris chrysogaster (Gray-hooded Bush-Tanager (chrysogaster))
- Cnemoscopus rubrirostris rubrirostris (Gray-hooded Bush-Tanager (rubrirostris))
- Coeligena bonapartei eos (Golden-bellied Starfrontlet (Golden-tailed))
- Coeligena torquata [inca Group] (Collared Inca (Gould’s))
- Coeligena torquata [torquata Group] (Collared Inca (Collared))
- Coereba flaveola [flaveola Group] (Bananaquit (Caribbean))
- Coereba flaveola bahamensis (Bananaquit (Bahamas))
- Coereba flaveola caboti (Bananaquit (Cozumel I.))
- Coereba flaveola mexicana (Bananaquit (Mainland))
- Colaptes auratus [auratus Group] (Northern Flicker (Yellow-shafted))
- Colaptes auratus [cafer Group] (Northern Flicker (Red-shafted))
- Colaptes auratus mexicanoides (Northern Flicker (Guatemalan))
- Colaptes rubiginosus [rubiginosus Group] (Golden-olive Woodpecker (Golden-olive))
- Colaptes rubiginosus aeruginosus (Golden-olive Woodpecker (Bronze-winged))
- Colibri thalassinus thalassinus (Green Violetear (Northern))
- Colinus virginianus [coyolcos Group] (Northern Bobwhite (Masked))
- Colinus virginianus [pectoralis Group] (Northern Bobwhite (pectoralis))
- Colinus virginianus [virginianus Group] (Northern Bobwhite (Eastern))
- Colinus virginianus graysoni/nigripectus (Northern Bobwhite (graysoni))
- Contopus cinereus [cinereus Group] (Tropical Pewee (Tropical))
- Contopus cinereus punensis (Tropical Pewee (Tumbes))
- Contopus latirostris brunneicapillus (Lesser Antillean Pewee (Lesser Antilles))
- Contopus latirostris latirostris (Lesser Antillean Pewee (St. Lucia))
- Corvus corax principalis (Common Raven (Northern))
- Corvus corax sinuatus (Common Raven (Southwestern))
- Coturnicops noveboracensis goldmani (Yellow Rail (Mexican))
- Coturnicops noveboracensis noveboracensis (Yellow Rail (Northern))
- Cranioleuca vulpina [vulpina Group] (Rusty-backed Spinetail (Rusty-backed))
- Cranioleuca vulpina dissita (Rusty-backed Spinetail (Coiba))
- Cyanocitta stelleri [coronata Group] (Steller’s Jay (Central American))
- Cyanocitta stelleri [macrolopha Group] (Steller’s Jay (Interior))
- Cyanocitta stelleri [stelleri Group] (Steller’s Jay (Coastal))
- Cyclarhis gujanensis [gujanensis Group] (Rufous-browed Peppershrike (Mainland))
- Cyclarhis gujanensis [virenticeps Group] (Rufous-browed Peppershrike (Yellow-backed))
- Cyclarhis gujanensis insularis (Rufous-browed Peppershrike (Cozumel I.))
- Cygnus columbianus bewickii (Tundra Swan (Bewick’s))
- Cygnus columbianus columbianus (Tundra Swan (Whistling))
- Cynanthus latirostris [latirostris Group] (Broad-billed Hummingbird (Northern))
- Cynanthus latirostris doubledayi (Broad-billed Hummingbird (Doubleday’s))
- Cypseloides niger borealis (Black Swift (Northern))
- Cypseloides niger costaricensis (Black Swift (Central American))
- Cypseloides niger niger (Black Swift (Caribbean))
- Cyrtonyx montezumae [montezumae Group] (Montezuma Quail (Montezuma))
- Dendrocincla fuliginosa [fuliginosa Group] (Plain-brown Woodcreeper (Plain-brown))
- Dendrocincla fuliginosa [meruloides Group] (Plain-brown Woodcreeper (meruloides Group))
- Dendrocincla fuliginosa taunayi (Plain-brown Woodcreeper (taunayi))
- Dendrocincla fuliginosa turdina (Plain-brown Woodcreeper (Thrush-like))
- Dendroica coronata auduboni (memorabilis) (Yellow-rumped Warbler (Audubon’s))
- Dendroica coronata coronata (hooveri) (Yellow-rumped Warbler (Myrtle))
- Dendroica coronata goldmani (Yellow-rumped Warbler (Goldman’s))
- Dendroica coronata nigrifrons (Yellow-rumped Warbler (West Mexico))
- Dendroica dominica albilora (Yellow-throated Warbler (White-lored))
- Dendroica dominica flavescens (Yellow-throated Warbler (Bahamas))
- Dendroica palmarum hypochrysea (Palm Warbler (Yellow))
- Dendroica palmarum palmarum (Palm Warbler (Western))
- Dendroica petechia [aestiva Group] (Yellow Warbler (Northern))
- Dendroica petechia [erithachorides Group] (Yellow Warbler (Mangrove))
- Dendroica petechia [petechia Group] (Yellow Warbler (Golden))
- Diglossa mystacalis albilinea (Moustached Flowerpiercer (albilinea))
- Diglossa mystacalis mystacalis (Moustached Flowerpiercer (mystacalis))
- Diglossa mystacalis pectoralis (Moustached Flowerpiercer (pectoralis))
- Diglossa mystacalis unicincta (Moustached Flowerpiercer (unicincta))
- Diomedea epomophora epomophora (Royal Albatross (Southern))
- Diomedea epomophora sanfordi (Royal Albatross (Northern))
- Diomedea exulans antipodensis (Wandering Albatross (New Zealand))
- Diomedea exulans exulans (Wandering Albatross (Snowy))
- Dysithamnus plumbeus leucostictus (Plumbeous Antvireo (White-streaked))
- Dysithamnus plumbeus plumbeus (Plumbeous Antvireo (Plumbeous))
- Elaenia albiceps [albiceps Group] (White-crested Elaenia (White-crested))
- Elaenia albiceps modesta (White-crested Elaenia (Peruvian))
- Elaenia martinica [martinica Group] (Caribbean Elaenia (Caribbean))
- Empidonax traillii brewsteri/adastus (Willow Flycatcher (Northwestern))
- Empidonax traillii extimus (Willow Flycatcher (Southwestern))
- Empidonax traillii traillii/campestris (Willow Flycatcher (Eastern))
- Eremophila alpestris [alpestris Group] (Horned Lark (Eastern dark Group))
- Eremophila alpestris [arcticola Group] (Horned Lark (Western pale Group))
- Eremophila alpestris [strigata Group] (Horned Lark (Western rufous Group))
- Eremophila alpestris flava (Horned Lark (flava))
- Ergaticus ruber ruber (Red Warbler (White-cheeked))
- Eriocnemis luciani [luciani Group] (Sapphire-vented Puffleg (Sapphire-vented))
- Eugenes fulgens fulgens (Magnificent Hummingbird (Northern))
- Eugenes fulgens spectabilis (Magnificent Hummingbird (Costa Rican))
- Euphonia affinis godmani (Scrub Euphonia (Godman’s))
- Falcipennis canadensis [canadensis Group] (Spruce Grouse (Eastern))
- Falcipennis canadensis franklinii (Spruce Grouse (Franklin’s))
- Falco columbarius columbarius (Merlin (Taiga))
- Falco columbarius richardsonii (Merlin (Prairie))
- Falco columbarius suckleyi (Merlin (Black))
- Falco peregrinus anatum (Peregrine Falcon (Continental))
- Falco peregrinus cassini (Peregrine Falcon (South American))
- Falco peregrinus pealei (Peregrine Falcon (Peale’s))
- Falco peregrinus tundrius (Peregrine Falcon (Tundra))
- Falco sparverius [sparverius Group] (American Kestrel (Northern))
- Falco sparverius caribaearum (American Kestrel (Eastern Caribbean))
- Falco sparverius dominicensis (American Kestrel (Hispaniolan))
- Falco sparverius sparverioides (American Kestrel (Cuban))
- Formicarius analis [analis Group] (Black-faced Antthrush (Central American))
- Formicarius analis [monileger Group] (Black-faced Antthrush (Mexican))
- Fulmarus glacialis auduboni (Northern Fulmar (auduboni))
- Fulmarus glacialis glacialis (Northern Fulmar (glacialis))
- Fulmarus glacialis rodgersii (Northern Fulmar (Pacific))
- Furnarius leucopus [leucopus Group] (Pale-legged Hornero (Pale-legged))
- Furnarius leucopus cinnamomeus (Pale-legged Hornero (Pacific))
- Galbula ruficauda [ruficauda Group] (Rufous-tailed Jacamar (Rufous-tailed))
- Gallinula chloropus [cachinnans Group] (Common Moorhen (American))
- Gallinula chloropus sandvicensis (Common Moorhen (Hawaiian))
- Geothlypis aequinoctialis [aequinoctialis Group] (Masked Yellowthroat (South American))
- Geothlypis aequinoctialis chiriquensis (Masked Yellowthroat (ChiriquÃ))
- Glaucidium brasilianum tucumanum (Ferruginous Pygmy-Owl (Tucuman))
- Glaucidium gnoma [californicum Group] (Northern Pygmy-Owl (Pacific))
- Glaucidium gnoma cobanense (Northern Pygmy-Owl (Guatemalan))
- Glaucidium gnoma gnoma (Northern Pygmy-Owl (Mountain))
- Glaucidium gnoma hoskinsii (Northern Pygmy-Owl (Cape))
- Glaucidium gnoma pinicola (Northern Pygmy-Owl (Rocky Mts.))
- Grus canadensis canadensis (Sandhill Crane (Lesser))
- Grus canadensis nesiotes (Sandhill Crane (Cuban))
- Grus canadensis pratensis (Sandhill Crane (Florida))
- Grus canadensis pulla (Sandhill Crane (Mississippi))
- Grus canadensis rowani (Sandhill Crane (rowani))
- Grus canadensis tabida (Sandhill Crane (Greater))
- Gygis alba alba (White Tern (Atlantic))
- Gygis alba microrhyncha (White Tern (Little))
- Heliangelus amethysticollis [amethysticollis Group] (Amethyst-throated Sunangel (Amethyst-throated))
- Heliangelus amethysticollis [clarisse Group] (Amethyst-throated Sunangel (Longuemare’s))
- Hemiphaga novaeseelandiae chathamensis (New Zealand Pigeon (Chatham Island))
- Hemiphaga novaeseelandiae novaeseelandiae (New Zealand Pigeon (New Zealand))
- Hemispingus atropileus atropileus (Black-capped Hemispingus (Black-capped))
- Hemispingus atropileus auricularis (Black-capped Hemispingus (White-browed))
- Hemispingus melanotis [melanotis Group] (Black-eared Hemispingus (Black-eared))
- Hemispingus melanotis ochraceus (Black-eared Hemispingus (Western))
- Hemispingus melanotis piurae (Black-eared Hemispingus (Piura))
- Hemispingus superciliaris [superciliaris Group] (Superciliaried Hemispingus (Superciliaried))
- Hemispingus superciliaris chrysophrys (Superciliaried Hemispingus (Yellow-browed))
- Hemispingus superciliaris insignis/leucogaster (Superciliaried Hemispingus (White-bellied))
- Hemispingus superciliaris urubambae (Superciliaried Hemispingus (urubambae))
- Himantopus mexicanus knudseni (Black-necked Stilt (Hawaiian))
- Himantopus mexicanus melanurus (Black-necked Stilt (White-backed))
- Himantopus mexicanus mexicanus (Black-necked Stilt (Black-necked))
- Hirundo rustica erythrogaster (Barn Swallow (American))
- Hirundo rustica gutturalis (Barn Swallow (gutturalis))
- Hirundo rustica rustica (Barn Swallow (rustica))
- Hylexetastes perrotii brigidai (Red-billed Woodcreeper (Brigida’s))
- Hylexetastes perrotii perrotii (Red-billed Woodcreeper (Red-billed))
- Hylexetastes perrotii uniformis (Red-billed Woodcreeper (Uniform))
- Hyloctistes subulatus [virgatus Group] (Striped Woodhaunter (Central American))
- Hyloctistes subulatus subulatus (Striped Woodhaunter (eastern South America))
- Hylopezus perspicillatus perspicillatus (Streak-chested Antpitta (Eastern Panama))
- Hylophilus decurtatus minor (Lesser Greenlet (Gray-headed))
- Hypnelus ruficollis [ruficollis Group] (Russet-throated Puffbird (Russet-throated))
- Icteria virens virens (Yellow-breasted Chat (Eastern))
- Icterus cayanensis [cayanensis Group] (Epaulet Oriole (Epaulet))
- Icterus cayanensis chrysocephalus (Epaulet Oriole (Moriche))
- Icterus cucullatus [cucullatus Group] (Hooded Oriole (Eastern))
- Icterus cucullatus [nelsoni Group] (Hooded Oriole (Western))
- Icterus dominicensis dominicensis (Greater Antillean Oriole (Hispaniolan))
- Icterus dominicensis melanopsis (Greater Antillean Oriole (Cuban))
- Icterus dominicensis portoricensis (Greater Antillean Oriole (Puerto Rico))
- Icterus graduacauda graduacauda/audubonii (Audubon’s Oriole (Audubon’s))
- Icterus pustulatus [pustulatus Group] (Streak-backed Oriole (Scarlet-headed))
- Icterus pustulatus [sclateri Group] (Streak-backed Oriole (Streak-backed))
- Icterus spurius fuertesi (Orchard Oriole (Fuertes’s))
- Icterus spurius spurius (Orchard Oriole (Orchard))
- Junco hyemalis [oreganus Group] (Dark-eyed Junco (Oregon))
- Junco hyemalis aikeni (Dark-eyed Junco (White-winged))
- Junco hyemalis caniceps (Dark-eyed Junco (Gray-headed))
- Junco hyemalis dorsalis (Dark-eyed Junco (Red-backed))
- Junco hyemalis hyemalis/carolinensis (Dark-eyed Junco (Slate-colored))
- Junco hyemalis insularis (Dark-eyed Junco (Guadalupe))
- Junco hyemalis mearnsi (Dark-eyed Junco (Pink-sided))
- Junco phaeonotus alticola (Yellow-eyed Junco (Guatemalan))
- Junco phaeonotus bairdi (Yellow-eyed Junco (Baird’s))
- Junco phaeonotus fulvescens (Yellow-eyed Junco (Chiapas))
- Junco phaeonotus phaeonotus/palliatus (Yellow-eyed Junco (Mexican))
- Knipolegus aterrimus [aterrimus Group] (White-winged Black-Tyrant (White-winged))
- Knipolegus aterrimus franciscanus (White-winged Black-Tyrant (Caatinga))
- Lampornis amethystinus [amethystinus Group] (Amethyst-throated Hummingbird (Amethyst-throated))
- Lampornis amethystinus margaritae (Amethyst-throated Hummingbird (Violet-throated))
- Lampornis castaneoventris castaneoventris (White-throated Mountain-gem (Blue-tailed))
- Larus argentatus argentatus/argenteus (Herring Gull (European))
- Larus argentatus smithsonianus (Herring Gull (American))
- Larus argentatus vegae (Herring Gull (Vega))
- Larus cachinnans barabensis (Caspian Gull (Steppe))
- Larus cachinnans cachinnans (Caspian Gull (Caspian))
- Larus cachinnans mongolicus (Caspian Gull (Mongolian))
- Larus californicus albertaensis (California Gull (albertaensis))
- Larus californicus californicus (California Gull (californicus))
- Larus canus brachyrhynchus (Mew Gull (American))
- Larus canus canus (Mew Gull (European))
- Larus canus heinei (Mew Gull (heinei))
- Larus canus kamtschatschensis (Mew Gull (Kamchatka))
- Larus fuscus fuscus (Lesser Black-backed Gull (fuscus))
- Larus fuscus graellsii (Lesser Black-backed Gull (graellsii))
- Larus fuscus heuglini (Lesser Black-backed Gull (Heuglin’s))
- Larus fuscus intermedius (Lesser Black-backed Gull (intermedius))
- Larus glaucoides glaucoides (Iceland Gull (glaucoides))
- Larus glaucoides kumlieni (Iceland Gull (Kumlien’s))
- Laterallus albigularis albigularis (White-throated Crake (Caribbean))
- Laterallus albigularis cinereiceps (White-throated Crake (Pacific))
- Laterallus jamaicensis [jamaicensis Group] (Black Rail (Northern))
- Laterallus jamaicensis [salinasi Group] (Black Rail (Coastal South America))
- Laterallus jamaicensis tuerosi (Black Rail (Junin))
- Leptasthenura aegithaloides aegithaloides (Plain-mantled Tit-Spinetail (aegithaloides))
- Leptasthenura aegithaloides berlepschi (Plain-mantled Tit-Spinetail (berlepschi))
- Leptasthenura aegithaloides pallida (Plain-mantled Tit-Spinetail (pallida))
- Leptopogon superciliaris superciliaris (Slaty-capped Flycatcher (superciliaris))
- Leptotila cassini cassini (Gray-chested Dove (cassini))
- Leptotila cassini rufinucha (Gray-chested Dove (rufinucha))
- Leptotila verreauxi [brasiliensis Group] (White-tipped Dove (brasiliensis Group))
- Leptotila verreauxi [verreauxi Group] (White-tipped Dove (White-tipped))
- Leptotila verreauxi decolor (White-tipped Dove (decolor))
- Leucopternis albicollis costaricensis (White Hawk (Central American))
- Leucopternis albicollis ghiesbreghti (White Hawk (Northern))
- Leucosticte tephrocotis [tephrocotis Group] (Gray-crowned Rosy-Finch (Gray-crowned))
- Leucosticte tephrocotis littoralis (Gray-crowned Rosy-Finch (Hepburn’s))
- Limnodromus griseus caurinus (Short-billed Dowitcher (Pacific))
- Limnodromus griseus griseus (Short-billed Dowitcher (Atlantic))
- Limnodromus griseus hendersoni (Short-billed Dowitcher (Prairie))
- Limosa lapponica baueri (Bar-tailed Godwit (Siberian))
- Limosa lapponica lapponica (Bar-tailed Godwit (European))
- Lurocalis semitorquatus [semitorquatus Group] (Short-tailed Nighthawk (Short-tailed))
- Lurocalis semitorquatus nattereri (Short-tailed Nighthawk (nattereri))
- Machaeropterus regulus [striolatus Group] (Striped Manakin (Western))
- Machaeropterus regulus aureopectus (Striped Manakin (aureopectus))
- Machaeropterus regulus regulus (Striped Manakin (Eastern))
- Megascops asio [asio Group] (Eastern Screech-Owl (Northern))
- Megascops guatemalae [guatemalae Group] (Vermiculated Screech-Owl (Guatemalan))
- Megascops guatemalae [napensis Group] (Vermiculated Screech-Owl (Foothill))
- Megascops guatemalae roraimae (Vermiculated Screech-Owl (Roraima))
- Megascops guatemalae vermiculatus (Vermiculated Screech-Owl (Vermiculated))
- Megascops kennicottii [kennicottii Group] (Western Screech-Owl (Northern))
- Melanerpes aurifrons [aurifrons Group] (Golden-fronted Woodpecker (Northern))
- Melanerpes aurifrons [dubius Group] (Golden-fronted Woodpecker (East Mexico))
- Melanitta fusca deglandi (White-winged Scoter (North American))
- Melanitta fusca fusca (White-winged Scoter (Velvet))
- Melanitta fusca stejnegeri (White-winged Scoter (Siberian))
- Melanitta nigra americana (Black Scoter (American))
- Melanitta nigra nigra (Black Scoter (Eurasian))
- Melozone biarcuata cabanisi (Prevost’s Ground-Sparrow (Cabanis’s))
- Mergus merganser americanus (Common Merganser (North American))
- Mergus merganser merganser (Common Merganser (Eurasian))
- Microcerculus marginatus [marginatus Group] (Scaly-breasted Wren (Southern))
- Microcerculus marginatus luscinia (Scaly-breasted Wren (Whistling))
- Microcerculus marginatus taeniatus/occidentalis (Scaly-breasted Wren (Scaly))
- Mitrephanes phaeocercus aurantiiventris (Tufted Flycatcher (Costa Rican))
- Mitrephanes phaeocercus phaeocercus/tenuirostris (Tufted Flycatcher (Mexican))
- Momotus momota [lessonii Group] (Blue-crowned Motmot (Lesson’s))
- Momotus momota [momota Group] (Blue-crowned Motmot (South American))
- Momotus momota [subrufescens Group] (Blue-crowned Motmot (Colombian))
- Momotus momota argenticinctus (Blue-crowned Motmot (argenticinctus))
- Momotus momota bahamensis (Blue-crowned Motmot (Trinidad))
- Momotus momota coeruliceps (Blue-crowned Motmot (Blue-crowned))
- Motacilla alba alba (White Wagtail (alba))
- Motacilla alba lugens (White Wagtail (Black-backed))
- Motacilla alba ocularis (White Wagtail (ocularis))
- Motacilla alba yarrellii (White Wagtail (yarrellii))
- Muscisaxicola rufivertex pallidiceps (Rufous-naped Ground-Tyrant (pallidiceps))
- Muscisaxicola rufivertex rufivertex/occipitalis (Rufous-naped Ground-Tyrant (Rufous-naped))
- Myiarchus tuberculifer olivascens (Dusky-capped Flycatcher (Arizona))
- Myiarchus tyrannulus cooperi (Brown-crested Flycatcher (Texas))
- Myiarchus tyrannulus magister (Brown-crested Flycatcher (Arizona))
- Myiobius barbatus [barbatus Group] (Whiskered Flycatcher (Whiskered))
- Myiobius barbatus mastacalis (Whiskered Flycatcher (Yellow-rumped))
- Myiodynastes maculatus [maculatus Group] (Streaked Flycatcher (Streaked))
- Myiodynastes maculatus solitarius (Streaked Flycatcher (solitarius))
- Myiopagis viridicata [jaliscensis Group] (Greenish Elaenia (West Mexico))
- Myiopagis viridicata [viridicata Group] (Greenish Elaenia (Greenish))
- Myiopsitta monachus [monachus Group] (Monk Parakeet (Monk))
- Myiopsitta monachus luchsi (Monk Parakeet (Cliff))
- Myrmotherula ignota ignota (Moustached Antwren (Moustached))
- Myrmotherula ignota obscura (Moustached Antwren (Short-billed))
- Nothocercus bonapartei [bonapartei Group] (Highland Tinamou (South American))
- Nothocercus bonapartei frantzii (Highland Tinamou (Costa Rican))
- Numenius phaeopus hudsonicus (Whimbrel (American))
- Numenius phaeopus phaeopus (Whimbrel (European))
- Numenius phaeopus variegatus (Whimbrel (Siberian))
- Nycticorax nycticorax falklandicus (Black-crowned Night-Heron (Falklands))
- Nycticorax nycticorax hoactli (Black-crowned Night-Heron (American))
- Nycticorax nycticorax nycticorax (Black-crowned Night-Heron (Eurasian))
- Ochthoeca cinnamomeiventris cinnamomeiventris (Slaty-backed Chat-Tyrant (Slaty-backed))
- Ochthoeca cinnamomeiventris nigrita (Slaty-backed Chat-Tyrant (Blackish))
- Ochthoeca frontalis spodionota/boliviana (Crowned Chat-Tyrant (Kalinowski’s))
- Oenanthe oenanthe leucorhoa (Northern Wheatear (Greenland))
- Oenanthe oenanthe oenanthe (Northern Wheatear (Eurasian))
- Onychorhynchus coronatus occidentalis (Royal Flycatcher (Pacific))
- Onychorhynchus coronatus swainsoni (Royal Flycatcher (Swainson’s))
- Oreotrochilus estella estella/bolivianus (Andean Hillstar (Andean))
- Oreotrochilus estella stolzmanni (Andean Hillstar (Green-headed))