- Orthorhyncus cristatus cristatus (Antillean Crested Hummingbird (Barbados))
- Orthorhyncus cristatus exilis (Antillean Crested Hummingbird (Lesser Antilles))
- Orthorhyncus cristatus ornatus (Antillean Crested Hummingbird (St. Vincent))
- Oxyura jamaicensis ferruginea (Ruddy Duck (Andean))
- Oxyura jamaicensis jamaicensis/andina (Ruddy Duck (Ruddy))
- Pachyramphus viridis viridis/griseigularis (Green-backed Becard (Green-backed))
- Pandion haliaetus carolinensis (Osprey (American))
- Pandion haliaetus ridgwayi (Osprey (Caribbean))
- Parula pitiayumi graysoni (Tropical Parula (Socorro I.))
- Parula pitiayumi inornata (Tropical Parula (South Mexico and Guatemala))
- Parula pitiayumi insularis (Tropical Parula (Tres Marias Is.))
- Parula pitiayumi nana (Tropical Parula (Eastern Panama))
- Parula pitiayumi pulchra (Tropical Parula (West Mexico))
- Parula pitiayumi speciosa (Tropical Parula (Central American))
- Passerculus sandwichensis [beldingi Group] (Savannah Sparrow (Belding’s))
- Passerculus sandwichensis [nevadensis Group] (Savannah Sparrow (Western))
- Passerculus sandwichensis [sandwichensis Group] (Savannah Sparrow (Eastern))
- Passerculus sandwichensis princeps (Savannah Sparrow (Ipswich))
- Passerculus sandwichensis rostratus/atratus (Savannah Sparrow (Large-billed))
- Passerculus sandwichensis sanctorum (Savannah Sparrow (San Benito))
- Passerella iliaca [megarhyncha Group] (Fox Sparrow (Thick-billed))
- Passerella iliaca [schistacea Group] (Fox Sparrow (Slate-colored))
- Passerella iliaca [unalaschcensis Group] (Fox Sparrow (Sooty))
- Passerella iliaca iliaca/zaboria (Fox Sparrow (Red))
- Patagioenas fasciata [albilinea Group] (Band-tailed Pigeon (White-necked))
- Patagioenas fasciata [fasciata Group] (Band-tailed Pigeon (Northern))
- Pelecanus occidentalis californicus (Brown Pelican (California))
- Pelecanus occidentalis carolinensis (Brown Pelican (Atlantic))
- Pelecanus occidentalis occidentalis (Brown Pelican (Caribbean))
- Perisoreus canadensis [canadensis Group] (Gray Jay (Northern))
- Perisoreus canadensis [obscurus Group] (Gray Jay (Pacific))
- Petrochelidon fulva [fulva Group] (Cave Swallow (Caribbean))
- Petrochelidon fulva pallida (pelodoma) (Cave Swallow (Texas))
- Petrochelidon pyrrhonota [pyrrhonota Group] (Cliff Swallow (Northern))
- Petrochelidon pyrrhonota melanogaster (Cliff Swallow (Southwestern))
- Petroica australis australis (New Zealand Robin (South Island))
- Petroica australis longipes (New Zealand Robin (North Island))
- Petroica macrocephala [macrocephala Group] (Tomtit (New Zealand))
- Petroica macrocephala dannefaerdi (Tomtit (Snares Is.))
- Phacellodomus erythrophthalmus erythrophthalmus (Red-eyed Thornbird (Orange-eyed))
- Phaeomyias murina [murina Group] (Mouse-colored Tyrannulet (Mouse-colored))
- Phaeomyias murina maranonica (Mouse-colored Tyrannulet (Maranon))
- Phaethon lepturus catesbyi (White-tailed Tropicbird (Atlantic))
- Phaethon lepturus dorotheae (White-tailed Tropicbird (Pacific))
- Phaethornis longirostris [longirostris Group] (Long-billed Hermit (Central American))
- Phaethornis longirostris [mexicanus Group] (Long-billed Hermit (Mexican))
- Phalacrocorax atriceps albiventer (Imperial Cormorant (King))
- Phalacrocorax atriceps atriceps (Imperial Cormorant (Blue-eyed))
- Phalacrocorax auritus albociliatus/cincinatus (Double-crested Cormorant (White-crested))
- Phalacrocorax carbo carbo (Great Cormorant (Northern))
- Phalacrocorax carbo novaehollandiae (Great Cormorant (Australasian))
- Phasianus colchicus [colcichus Group] (Ring-necked Pheasant (Ring-necked))
- Phasianus colchicus [versicolor Group] (Ring-necked Pheasant (Green))
- Pheucticus aureoventris aureoventris (Black-backed Grosbeak (Black-rumped))
- Pheucticus aureoventris crissalis (Black-backed Grosbeak (Yellow-throated))
- Pheucticus chrysopeplus aurantiacus (Yellow Grosbeak (Guatemalan))
- Phibalura flavirostris boliviana (Swallow-tailed Cotinga (Palkachupa))
- Phibalura flavirostris flavirostris (Swallow-tailed Cotinga (Swallow-tailed))
- Philesturnus carunculatus carunculatus (Saddleback (South Island))
- Philesturnus carunculatus rufusater (Saddleback (North Island))
- Phyllomyias burmeisteri burmeisteri (Rough-legged Tyrannulet (Burmeister’s))
- Piaya cayana [cayana Group] (Squirrel Cuckoo (Amazonian))
- Piaya cayana mexicana (Squirrel Cuckoo (West Mexico))
- Piaya cayana nigricrissa (Squirrel Cuckoo (nigricrissa))
- Picoides dorsalis fasciatus (American Three-toed Woodpecker (Northwest))
- Picumnus exilis [exilis Group] (Golden-spangled Piculet (Golden-spangled))
- Picumnus exilis salvini (Golden-spangled Piculet (Black-spotted))
- Pipilo maculatus [maculatus Group] (Spotted Towhee (Rocky Mts.))
- Pipilo maculatus [oregonus Group] (Spotted Towhee (Pacific))
- Pipilo maculatus macronyx (Spotted Towhee (Olive-backed))
- Pipilo maculatus socorroensis (Spotted Towhee (Socorro))
- Pipreola frontalis frontalis (Scarlet-breasted Fruiteater (frontalis))
- Pipreola frontalis squamipectus (Scarlet-breasted Fruiteater (squamipectus))
- Pipreola intermedia intermedia (Band-tailed Fruiteater (intermedia))
- Pipreola intermedia signata (Band-tailed Fruiteater (signata))
- Pipreola riefferii [riefferii Group] (Green-and-black Fruiteater (riefferii))
- Pipreola riefferii tallmanorum (Green-and-black Fruiteater (tallmanorum))
- Piranga flava [flava Group] (Hepatic Tanager (Lowland))
- Piranga flava [hepatica Group] (Hepatic Tanager (Northern))
- Piranga flava [lutea Group] (Hepatic Tanager (Highland))
- Piranga rubra cooperi (ochracea) (Summer Tanager (Western))
- Piranga rubra rubra (Summer Tanager (Eastern))
- Podiceps occipitalis juninensis (Silvery Grebe (Junin))
- Podiceps occipitalis occipitalis (Silvery Grebe (Silvery))
- Poecile gambeli [baileyae Group] (Mountain Chickadee (Sierra Nevada))
- Poecile gambeli [gambeli Group] (Mountain Chickadee (Rocky Mts.))
- Polioptila caerulea [amoenissima Group] (Blue-gray Gnatcatcher (Western))
- Polioptila caerulea caerulea (Blue-gray Gnatcatcher (Eastern))
- Polioptila plumbea [bilineata Group] (Tropical Gnatcatcher (White-browed))
- Polioptila plumbea [plumbea Group] (Tropical Gnatcatcher (Tropical))
- Polioptila plumbea maior (Tropical Gnatcatcher (Maranon))
- Poospiza nigrorufa nigrorufa (Black-and-rufous Warbling-Finch (Black-and-rufous))
- Progne subis hesperia (Purple Martin (Desert))
- Progne subis subis/arboricola (Purple Martin (Northern))
- Progne tapera fusca (Brown-chested Martin (fusca))
- Progne tapera tapera (Brown-chested Martin (tapera))
- Psaltriparus minimus [melanotis Group] (Bushtit (Black-eared))
- Psaltriparus minimus [minimus Group] (Bushtit (Pacific))
- Psaltriparus minimus [plumbeus Group] (Bushtit (Interior))
- Pterodroma arminjoniana arminjoniana (Herald Petrel (Trinidade))
- Pterodroma arminjoniana heraldica (Herald Petrel (Pacific))
- Pterodroma hasitata caribbaea (Black-capped Petrel (Jamaican))
- Pterodroma hasitata hasitata (Black-capped Petrel (hasitata))
- Pterodroma macroptera gouldi (Great-winged Petrel (gouldi))
- Pterodroma macroptera macroptera (Great-winged Petrel (macroptera))
- Puffinus assimilis assimilis (Little Shearwater (assimilis))
- Puffinus assimilis baroli (Little Shearwater (baroli))
- Puffinus assimilis boydi (Little Shearwater (boydi))
- Puffinus assimilis elegans (Little Shearwater (elegans))
- Puffinus assimilis haurakiensis (Little Shearwater (haurakiensis))
- Puffinus assimilis myrtae (Little Shearwater (myrtae))
- Puffinus assimilis tunneyi (Little Shearwater (tunneyi))
- Puffinus auricularis auricularis (Townsend’s Shearwater (Townsend’s))
- Puffinus auricularis newelli (Townsend’s Shearwater (Newell’s))
- Puffinus lherminieri dichrous (Audubon’s Shearwater (dichrous))
- Puffinus lherminieri lherminieri (Audubon’s Shearwater (lherminieri))
- Puffinus lherminieri loyemilleri (Audubon’s Shearwater (loyemilleri))
- Pygochelidon cyanoleuca cyanoleuca (Blue-and-white Swallow (cyanoleuca))
- Pygochelidon cyanoleuca patagonica (Blue-and-white Swallow (patagonica))
- Pygochelidon cyanoleuca peruviana (Blue-and-white Swallow (peruviana))
- Pyrrhura amazonum amazonum (Santarem Parakeet (Santarem))
- Pyrrhura leucotis griseipectus (White-eared Parakeet (Gray-breasted))
- Pyrrhura leucotis leucotis (White-eared Parakeet (White-eared))
- Pyrrhura picta [picta Group] (Painted Parakeet (Painted))
- Pyrrhura picta caeruleiceps (Painted Parakeet (Todd’s))
- Pyrrhura picta eisenmanni (Painted Parakeet (Azuero))
- Pyrrhura picta subandina (Painted Parakeet (Sinu))
- Pyrrhura roseifrons roseifrons (Rose-fronted Parakeet (Rose-fronted))
- Quiscalus major major (Boat-tailed Grackle (Atlantic Coast))
- Quiscalus quiscula versicolor (Common Grackle (Bronzed))
- Rallus longirostris beldingi (Clapper Rail (South Baja))
- Rallus longirostris crepitans/waynei (Clapper Rail (Atlantic Coast))
- Rallus longirostris levipes (Clapper Rail (Light-footed))
- Rallus longirostris obsoletus (Clapper Rail (San Francisco Bay))
- Rallus longirostris yumanensis (Clapper Rail (Yuma))
- Ramphocaenus melanurus [melanurus Group] (Long-billed Gnatwren (Long-billed))
- Ramphocaenus melanurus [rufiventris Group] (Long-billed Gnatwren (rufiventris))
- Ramphocaenus melanurus obscurus (Long-billed Gnatwren (obscurus))
- Ramphocelus flammigerus flammigerus (Flame-rumped Tanager (Flame-rumped))
- Ramphocelus flammigerus icteronotus (Flame-rumped Tanager (Lemon-rumped))
- Rhea pennata garleppi/tarapacensis (Lesser Rhea (Puna))
- Rhea pennata pennata (Lesser Rhea (Darwin’s))
- Rissa tridactyla pollicaris (Black-legged Kittiwake (Pacific))
- Rissa tridactyla tridactyla (Black-legged Kittiwake (Atlantic))
- Rynchops niger cinerascens (Black Skimmer (cinerascens))
- Rynchops niger intercedens (Black Skimmer (intercedens))
- Rynchops niger niger (Black Skimmer (Northern))
- Salpinctes obsoletus [fasciatus Group] (Rock Wren (Central American))
- Salpinctes obsoletus [obsoletus Group] (Rock Wren (Northern))
- Saxicola torquatus [maurus Group] (Stonechat (Siberian))
- Saxicola torquatus [torquatus Group] (Stonechat (African))
- Saxicola torquatus rubicola/hibernans (Stonechat (European))
- Schiffornis turdina [turdina Group] (Thrush-like Schiffornis (Southern))
- Schiffornis turdina [veraepacis Group] (Thrush-like Schiffornis (Northern))
- Selasphorus flammula flammula (Volcano Hummingbird (Purple-throated))
- Selasphorus sasin sasin (Allen’s Hummingbird (sasin))
- Selasphorus sasin sedentarius (Allen’s Hummingbird (sedentarius))
- Sitta carolinensis [aculeata Group] (White-breasted Nuthatch (Pacific))
- Sitta carolinensis [mexicana Group] (White-breasted Nuthatch (Interior West))
- Sitta carolinensis carolinensis (White-breasted Nuthatch (Eastern))
- Sitta pusilla insularis (Brown-headed Nuthatch (Grand Bahama))
- Sitta pusilla pusilla (Brown-headed Nuthatch (Southeast))
- Somateria mollissima borealis (Common Eider (Boreal))
- Somateria mollissima dresseri (Common Eider (Atlantic))
- Somateria mollissima sedentaria (Common Eider (Hudson Bay))
- Somateria mollissima v-nigra (Common Eider (Pacific))
- Spindalis zena benedicti (Western Spindalis (Cozumel I.))
- Spindalis zena pretrei (Western Spindalis (Cuban))
- Spindalis zena salvini (Western Spindalis (Grand Cayman I.))
- Spindalis zena townsendi (Western Spindalis (Northern Bahamas))
- Spindalis zena zena (Western Spindalis (Southern Bahamas))
- Spizella breweri breweri (Brewer’s Sparrow (breweri))
- Spizella breweri taverneri (Brewer’s Sparrow (Timberline))
- Sporophila torqueola [morelleti Group] (White-collared Seedeater (White-collared))
- Sporophila torqueola torqueola (White-collared Seedeater (Cinnamon-rumped))
- Stelgidopteryx serripennis [serripennis Group] (Northern Rough-winged Swallow (Northern))
- Stelgidopteryx serripennis ridgwayi (Northern Rough-winged Swallow (Ridgway’s))
- Stercorarius antarcticus antarcticus (Brown Skua (Southern))
- Stercorarius antarcticus hamiltoni (Brown Skua (hamiltoni))
- Stercorarius antarcticus lonnbergi (Brown Skua (Brown))
- Sterna hirundo hirundo (Common Tern (Common))
- Sterna hirundo longipennis (Common Tern (Siberian))
- Sternula antillarum antillarum (Least Tern (Atlantic))
- Sternula antillarum athalassos (Least Tern (Interior))
- Sternula antillarum browni (Least Tern (California))
- Strix occidentalis caurina (Spotted Owl (Northern))
- Strix occidentalis lucida (Spotted Owl (Mexican))
- Strix occidentalis occidentalis (Spotted Owl (California))
- Sturnella magna [magna Group] (Eastern Meadowlark (Eastern))
- Sturnella magna hippocrepis (Eastern Meadowlark (Cuban))
- Sturnella magna lilianae (Eastern Meadowlark (Lilian’s))
- Sula leucogaster brewsteri (Brown Booby (Pacific))
- Sula leucogaster leucogaster (Brown Booby (Atlantic))
- Sula leucogaster plotus (Brown Booby (Central Pacific))
- Sula sula rubripes (Red-footed Booby (Hawaiian))
- Sula sula sula (Red-footed Booby (Atlantic))
- Sula sula websteri (Red-footed Booby (Eastern Pacific))
- Synallaxis stictothorax [stictothorax Group] (Necklaced Spinetail (Necklaced))
- Synallaxis stictothorax chinchipensis (Necklaced Spinetail (Chinchipe))
- Synthliboramphus hypoleucus hypoleucus (Xantus’s Murrelet (hypoleucus))
- Synthliboramphus hypoleucus scrippsi (Xantus’s Murrelet (scrippsi))
- Thalassarche cauta cauta/steadi (Shy Albatross (White-capped))
- Thalassarche cauta salvini (Shy Albatross (Salvin’s))
- Thalassarche chlororhynchos chlororhynchos (Yellow-nosed Albatross (Gray-headed))
- Thalassarche melanophris impavida (Black-browed Albatross (impavida))
- Thalassarche melanophris melanophris (Black-browed Albatross (melanophris))
- Thalasseus sandvicensis acuflavidus (Sandwich Tern (acuflavidus))
- Thamnophilus bernardi bernardi (Collared Antshrike (Collared))
- Thamnophilus bernardi shumbae (Collared Antshrike (shumbae))
- Thamnophilus punctatus leucogaster/huallagae (Northern Slaty-Antshrike (Maranon))
- Theristicus melanopis branickii (Black-faced Ibis (branickii))
- Theristicus melanopis melanopis (Black-faced Ibis (melanopis))
- Thryomanes bewickii [drymoecus Group] (Bewick’s Wren (Pacific))
- Thryomanes bewickii [eremophilus Group] (Bewick’s Wren (Interior West))
- Thryomanes bewickii bewickii/altus (Bewick’s Wren (Eastern))
- Thryothorus ludovicianus [albinucha Group] (Carolina Wren (White-browed))
- Thryothorus ludovicianus [ludovicianus Group] (Carolina Wren (Northern))
- Thryothorus modestus [modestus Group] (Plain Wren (Plain))
- Thryothorus modestus zeledoni (Plain Wren (Canebrake))
- Thryothorus nigricapillus [castaneus Group] (Bay Wren (Central American))
- Thryothorus sclateri paucimaculatus (Speckle-breasted Wren (Speckle-breasted))
- Thryothorus sclateri sclateri (Speckle-breasted Wren (Maranon))
- Tolmomyias assimilis [assimilis Group] (Yellow-margined Flycatcher (Zimmer’s))
- Tolmomyias assimilis flavotectus (Yellow-margined Flycatcher (Yellow-margined))
- Tolmomyias flaviventris [flaviventris Group] (Yellow-breasted Flycatcher (Ochre-lored))
- Tolmomyias flaviventris [viridiceps Group] (Yellow-breasted Flycatcher (Olive-faced))
- Tolmomyias sulphurescens aequatorialis (Yellow-olive Flycatcher (Equatorial))
- Tolmomyias sulphurescens cherriei/duidae (Yellow-olive Flycatcher (Guianan))
- Tolmomyias sulphurescens cinereiceps (Yellow-olive Flycatcher (Gray-headed))
- Tolmomyias sulphurescens mixtus (Yellow-olive Flycatcher (Para))
- Tolmomyias sulphurescens pallescens (Yellow-olive Flycatcher (Mato Grosso))
- Tolmomyias sulphurescens peruvianus (Yellow-olive Flycatcher (Andes))
- Tolmomyias sulphurescens sulphurescens (Yellow-olive Flycatcher (Sooretama))
- Toxostoma curvirostre [curvirostre Group] (Curve-billed Thrasher (Eastern))
- Toxostoma curvirostre [palmeri Group] (Curve-billed Thrasher (Western))
- Toxostoma lecontei arenicola (Le Conte’s Thrasher (Vizcaino))
- Toxostoma lecontei lecontei/macmillanorum (Le Conte’s Thrasher (Le Conte’s))
- Tringa semipalmata inornata (Willet (Western))
- Tringa semipalmata semipalmata (Willet (Eastern))
- Tringa solitaria cinnamomea (Solitary Sandpiper (Western))
- Tringa solitaria solitaria (Solitary Sandpiper (Eastern))
- Trochilus polytmus polytmus (Streamertail (Red-billed))
- Trochilus polytmus scitulus (Streamertail (Black-billed))
- Troglodytes aedon [aedon Group] (House Wren (Northern))
- Troglodytes aedon [brunneicollis Group] (House Wren (Brown-throated))
- Troglodytes aedon [martinicensis Group] (House Wren (Caribbean))
- Troglodytes aedon [musculus Group] (House Wren (Southern))
- Troglodytes aedon beani (House Wren (Cozumel I.))
- Troglodytes aedon cobbi (House Wren (Cobb’s))
- Troglodytes troglodytes [alascensis Group] (Winter Wren (Alaskan islands))
- Troglodytes troglodytes [pacificus Group] (Winter Wren (Western))
- Troglodytes troglodytes hiemalis/pusillus (Winter Wren (Eastern))
- Trogon melanurus [melanurus Group] (Black-tailed Trogon (Black-tailed))
- Trogon melanurus mesurus (Black-tailed Trogon (Ecuadorian))
- Turdus migratorius [migratorius Group] (American Robin (Eastern))
- Turdus migratorius [propinquus Group] (American Robin (Western))
- Turdus migratorius nigrideus (American Robin (Newfoundland))
- Turdus naumanni eunomus (Dusky Thrush (eunomus))
- Turdus naumanni naumanni (Dusky Thrush (naumanni))
- Turdus nigriceps nigriceps (Slaty Thrush (Andean))
- Turdus nigriceps subalaris (Slaty Thrush (Eastern))
- Turdus nudigenis maculirostris (Spectacled Thrush (Ecuadorian))
- Turdus rufopalliatus graysoni (Rufous-backed Robin (Grayson’s))
- Turdus rufopalliatus rufopalliatus (Rufous-backed Robin (Rufous-backed))
- Tympanuchus cupido attwateri (Greater Prairie-Chicken (Attwater’s))
- Tympanuchus cupido cupido (Greater Prairie-Chicken (Heath Hen))
- Tympanuchus cupido pinnatus (Greater Prairie-Chicken (pinnatus))
- Tyrannus savana monachus (Fork-tailed Flycatcher (monachus))
- Tyrannus savana savana (Fork-tailed Flycatcher (savana))
- Uropsila leucogastra [leucogastra Group] (White-bellied Wren (Middle America))
- Uropsila leucogastra pacifica (White-bellied Wren (West Mexico))
- Vanellus chilensis cayennensis (Southern Lapwing (Northern))
- Vanellus chilensis chilensis/fretensis (Southern Lapwing (Southern South America))
- Vanellus chilensis lampronotus (Southern Lapwing (Central South America))
- Vermivora celata celata (Orange-crowned Warbler (celata))
- Vermivora celata lutescens (Orange-crowned Warbler (lutescens))
- Vermivora celata orestera (Orange-crowned Warbler (orestera))
- Vermivora celata sordida (Orange-crowned Warbler (sordida))
- Vermivora ruficapilla ridgwayi (Nashville Warbler (Western))
- Vermivora ruficapilla ruficapilla (Nashville Warbler (Eastern))
- Vireo bellii arizonae (Bell’s Vireo (Arizona))
- Vireo bellii bellii/medius (Bell’s Vireo (Eastern))
- Vireo bellii pusillus (Bell’s Vireo (Least))
- Vireo gilvus [swainsoni Group] (Warbling Vireo (Western))
- Vireo gilvus gilvus (Warbling Vireo (Eastern))
- Vireo huttoni [huttoni Group] (Hutton’s Vireo (Pacific))
- Vireo huttoni [stephensi Group] (Hutton’s Vireo (Interior))
- Vireo olivaceus [chivi Group] (Red-eyed Vireo (migratory Chivi))
- Vireo olivaceus [griseobarbatus Group] (Red-eyed Vireo (resident Chivi))
- Vireo olivaceus olivaceus (Red-eyed Vireo (Red-eyed))
- Vireo pallens pallens (Mangrove Vireo (Southern Central America))
- Willisornis poecilinotus gutturalis (Scale-backed Antbird (gutturalis))
- Wilsonia pusilla chryseola (Wilson’s Warbler (Pacific Coast))
- Wilsonia pusilla pileolata (Wilson’s Warbler (Mountain West))
- Wilsonia pusilla pusilla (Wilson’s Warbler (Eastern))
- Xenodacnis parina parina (Tit-like Dacnis (parina))
- Xiphocolaptes promeropirhynchus [emigrans Group] (Strong-billed Woodcreeper (Central American))
- Xiphocolaptes promeropirhynchus [orenocensis Group] (Strong-billed Woodcreeper (Amazonian))
- Xiphorhynchus guttatus [eytoni Group] (Buff-throated Woodcreeper (Dusky-billed))
- Xiphorhynchus guttatus [guttatoides Group] (Buff-throated Woodcreeper (Lafresnaye’s))
- Xiphorhynchus guttatus [guttatus Group] (Buff-throated Woodcreeper (Buff-throated))
- Xiphorhynchus ocellatus [chunchotambo Group] (Ocellated Woodcreeper (Tschudi’s))
- Xiphorhynchus ocellatus [ocellatus Group] (Ocellated Woodcreeper (Ocellated))
- Xiphorhynchus susurrans [nanus Group] (Cocoa Woodcreeper (Lawrence’s))
- Xiphorhynchus susurrans [susurrans Group] (Cocoa Woodcreeper (Cocoa))
- Zenaida macroura [carolinensis Group] (Mourning Dove (Mainland))
- Zenaida macroura macroura (Mourning Dove (Caribbean))
- Zimmerius vilissimus [improbus Group] (Paltry Tyrannulet (Venezuelan))
- Zimmerius vilissimus parvus (Paltry Tyrannulet (Mistletoe))
- Zimmerius vilissimus vilissimus (Paltry Tyrannulet (Paltry))
- Zonotrichia leucophrys gambelii (White-crowned Sparrow (Gambel’s))
- Zonotrichia leucophrys leucophrys (White-crowned Sparrow (Eastern))
- Zonotrichia leucophrys nuttalli (White-crowned Sparrow (Nuttall’s))
- Zonotrichia leucophrys oriantha (White-crowned Sparrow (Mountain))
- Zonotrichia leucophrys pugetensis (White-crowned Sparrow (Puget Sound))