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Updated ~23 hours ago
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Native and Naturalized (1121)
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Exotic: Provisional (32)
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Exotic: Escapee (239)
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Hybrids (313)
- Downy x Hairy Woodpecker (hybrid) Dryobates pubescens x villosusDetails:
- Tufted x Black-crested Titmouse (hybrid) Baeolophus bicolor x atricristatus
- Northern Shoveler x Gadwall (hybrid) Spatula clypeata x Mareca streperaDetails:
- Common Black x Red-shouldered Hawk (hybrid) Buteogallus anthracinus x Buteo lineatusDetails:
- Dark-eyed Junco x White-throated Sparrow (hybrid) Junco hyemalis x Zonotrichia albicollisDetails:
- Tufted Duck x scaup sp. (hybrid) Aythya fuligula x marila/affinisDetails:
- Downy x Nuttall's Woodpecker (hybrid) Dryobates pubescens x nuttalliiDetails:
- Scarlet x Western Tanager (hybrid) Piranga olivacea x ludovicianaDetails:
- Mallard x Mexican/Mottled Duck (hybrid) Anas platyrhynchos x diazi/fulvigulaDetails:
- Anna's x Rufous Hummingbird (hybrid) Calypte anna x Selasphorus rufusDetails:
- Mexican x Mottled Duck (hybrid) Anas diazi x fulvigula
- American Wigeon x Northern Pintail (hybrid) Mareca americana x Anas acutaDetails:
- Black-bellied x Fulvous Whistling-Duck (hybrid) Dendrocygna autumnalis x bicolorDetails:
- House x Purple Finch (hybrid) Haemorhous mexicanus x purpureusDetails:
- Laughing x Ring-billed Gull (hybrid) Leucophaeus atricilla x Larus delawarensisDetails:
- Yellow-bellied/Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus varius/nuchalis x ruberDetails:
- Ring-necked Duck x Greater Scaup (hybrid) Aythya collaris x marilaDetails:
- Tufted Duck x Greater Scaup (hybrid) Aythya fuligula x marilaDetails:
- Tufted Duck x Lesser Scaup (hybrid) Aythya fuligula x affinisDetails:
- Anna's x Broad-billed Hummingbird (hybrid) Calypte anna x Cynanthus latirostrisDetails:
- Cinnamon x Green-winged Teal (hybrid) Spatula cyanoptera x Anas creccaDetails:
- Black-throated Gray x Townsend's Warbler (hybrid) Setophaga nigrescens x townsendiDetails:
- American Wigeon x Green-winged Teal (hybrid) Mareca americana x Anas creccaDetails:
- Magnolia x Yellow-rumped Warbler (hybrid) Setophaga magnolia x coronataDetails:
- Red-tailed x Ferruginous Hawk (hybrid) Buteo jamaicensis x regalisDetails:
- Red-tailed x Rough-legged Hawk (hybrid) Buteo jamaicensis x lagopusDetails:
- Bufflehead x goldeneye sp. (hybrid) Bucephala albeola x clangula/islandicaDetails:
- Canvasback x Ring-necked Duck (hybrid) Aythya valisineria x collarisDetails:
- Blue-winged x Green-winged Teal (hybrid) Spatula discors x Anas creccaDetails:
- Hooded x Common Merganser (hybrid) Lophodytes cucullatus x Mergus merganserDetails:
- White-crowned x White-throated Sparrow (hybrid) Zonotrichia leucophrys x albicollisDetails:
- Yellow-rumped x Townsend's Warbler (hybrid) Setophaga coronata x townsendiDetails:
- Greater White-fronted x Cackling/Canada Goose (hybrid) Anser albifrons x Branta hutchinsii/canadensisDetails:
- Mallard x Green-winged Teal (hybrid) Anas platyrhynchos x creccaDetails:
- Redhead x scaup sp. (hybrid) Aythya americana x marila/affinisDetails:
- Redhead x Ring-necked Duck (hybrid) Aythya americana x collarisDetails:
- Greater White-fronted x Cackling Goose (hybrid) Anser albifrons x Branta hutchinsiiDetails:
- Common Goldeneye x Hooded Merganser (hybrid) Bucephala clangula x Lophodytes cucullatusDetails:
- Red-whiskered x Red-vented Bulbul (hybrid) Pycnonotus jocosus x caferDetails:
- Black-headed x Ring-billed Gull (hybrid) Chroicocephalus ridibundus x Larus delawarensisDetails:
- Ring-necked Duck x scaup sp. (hybrid) Aythya collaris x marila/affinisDetails:
- Gray-crowned x Black Rosy-Finch (hybrid) Leucosticte tephrocotis x atrataDetails:
- Northern Pintail x Green-winged Teal (hybrid) Anas acuta x creccaDetails:
- Red-crowned x Lilac-crowned Parrot (hybrid) Amazona viridigenalis x finschi
- Mute x Trumpeter Swan (hybrid) Cygnus olor x buccinatorDetails:
- Golden-crowned x White-throated Sparrow (hybrid) Zonotrichia atricapilla x albicollisDetails:
- Steller's x Blue Jay (hybrid) Cyanocitta stelleri x cristataDetails:
- Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acutaDetails:
- Black-capped x Mountain Chickadee (hybrid) Poecile atricapillus x gambeliDetails:
- Eurasian x American Wigeon (hybrid) Mareca penelope x americana
- Eurasian x African Collared-Dove (hybrid) Streptopelia decaocto x roseogriseaDetails:
- Fischer's x Yellow-collared Lovebird (hybrid) Agapornis fischeri x personatusDetails:
- Mallard x Pacific Black Duck (hybrid) Anas platyrhynchos x superciliosaDetails:
- Yellow-rumped x Hermit Warbler (hybrid) Setophaga coronata x occidentalisDetails:
- Townsend's x Black-throated Green Warbler (hybrid) Setophaga townsendi x virensDetails:
- Herring x Slaty-backed Gull (hybrid) Larus argentatus x schistisagusDetails:
- Mountain x Mexican Chickadee (hybrid) Poecile gambeli x sclateriDetails:
- Broad-billed x Violet-crowned Hummingbird (hybrid) Cynanthus latirostris x Ramosomyia violicepsDetails:
- Anna's x Calliope Hummingbird (hybrid) Calypte anna x Selasphorus calliopeDetails:
- Lucifer x Black-chinned Hummingbird (hybrid) Calothorax lucifer x Archilochus alexandriDetails:
- Black-chinned x Broad-tailed Hummingbird (hybrid) Archilochus alexandri x Selasphorus platycercusDetails:
- Black-chinned x Anna's Hummingbird (hybrid) Archilochus alexandri x Calypte annaDetails:
- Calliope x Rufous Hummingbird (hybrid) Selasphorus calliope x rufusDetails:
- Sandwich x Elegant Tern (hybrid) Thalasseus sandvicensis x elegansDetails:
- Barn x Cliff Swallow (hybrid) Hirundo rustica x Petrochelidon pyrrhonotaDetails:
- Black-chinned x Calliope Hummingbird (hybrid) Archilochus alexandri x Selasphorus calliopeDetails:
- Little Blue Heron x Snowy Egret (hybrid) Egretta caerulea x thulaDetails:
- Yellow-bellied x Red-breasted Sapsucker (hybrid) Sphyrapicus varius x ruberDetails:
- Black-chinned x Broad-billed Hummingbird (hybrid) Archilochus alexandri x Cynanthus latirostrisDetails:
- Barn x Cave Swallow (hybrid) Hirundo rustica x Petrochelidon fulvaDetails:
- Colima x Virginia's Warbler (hybrid) Leiothlypis crissalis x virginiaeDetails:
- Northern Parula x Black-throated Gray Warbler (hybrid) Setophaga americana x nigrescensDetails:
- Western x Chihuahuan Meadowlark (hybrid) Sturnella neglecta x lilianaeDetails:
- Bahama x Northern Mockingbird (hybrid) Mimus gundlachii x polyglottosDetails:
- Bay-breasted x Blackpoll Warbler (hybrid) Setophaga castanea x striataDetails:
- Pine Siskin x American Goldfinch (hybrid) Spinus pinus x tristisDetails:
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Details:
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Details:
- Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihiDetails:
- Yellow-rumped x Grace's Warbler (hybrid) Setophaga coronata x graciaeDetails:
- White-crowned x Harris's Sparrow (hybrid) Zonotrichia leucophrys x querulaDetails:
- Bufflehead x Hooded Merganser (hybrid) Bucephala albeola x Lophodytes cucullatusDetails:
- Black-capped x White-eyed Vireo (hybrid) Vireo atricapilla x griseusDetails:
- Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
- Cape May x Magnolia Warbler (hybrid) Setophaga tigrina x magnoliaDetails:
- Black-throated Gray x Hermit Warbler (hybrid) Setophaga nigrescens x occidentalisDetails:
- Greater x Lesser Prairie-Chicken (hybrid) Tympanuchus cupido x pallidicinctusDetails:
- Steller's Jay x Woodhouse's Scrub-Jay (hybrid) Cyanocitta stelleri x Aphelocoma woodhouseiiDetails:
- MacGillivray's Warbler x Common Yellowthroat (hybrid) Geothlypis tolmiei x trichasDetails:
- Ladder-backed x Hairy Woodpecker (hybrid) Dryobates scalaris x villosusDetails:
- Ruby-throated x Black-chinned Hummingbird (hybrid) Archilochus colubris x alexandriDetails:
- Anna's x Costa's Hummingbird (hybrid) Calypte anna x costaeDetails:
- Ring-necked Duck x Lesser Scaup (hybrid) Aythya collaris x affinisDetails:
- Barrow's Goldeneye x Hooded Merganser (hybrid) Bucephala islandica x Lophodytes cucullatusDetails:
- Trumpeter x Tundra Swan (hybrid) Cygnus buccinator x columbianusDetails:
- Barnacle x Cackling Goose (hybrid) Branta leucopsis x hutchinsiiDetails:
- Blue-winged Teal x Northern Shoveler (hybrid) Spatula discors x clypeataDetails:
- Mute x Whooper Swan (hybrid) Cygnus olor x cygnusDetails:
- Dark-eyed Junco x White-crowned Sparrow (hybrid) Junco hyemalis x Zonotrichia leucophrysDetails:
- Western x Mountain Bluebird (hybrid) Sialia mexicana x currucoidesDetails:
- Snow/Ross's x Cackling/Canada Goose (hybrid) Anser caerulescens/rossii x Branta hutchinsii/canadensisDetails:
- Boat-tailed x Great-tailed Grackle (hybrid) Quiscalus major x mexicanusDetails:
- Mallard x Ring-necked Duck (hybrid) Anas platyrhynchos x Aythya collarisDetails:
- Herring x Lesser Black-backed Gull (hybrid) Larus argentatus x fuscusDetails:
- Hairy x White-headed Woodpecker (hybrid) Dryobates villosus x albolarvatusDetails:
- Black-chinned x Costa's Hummingbird (hybrid) Archilochus alexandri x Calypte costaeDetails:
- Bufflehead x Common Goldeneye (hybrid) Bucephala albeola x clangulaDetails:
- White x Scarlet Ibis (hybrid) Eudocimus albus x ruberDetails:
- Couch's Kingbird x Scissor-tailed Flycatcher (hybrid) Tyrannus couchii x forficatusDetails:
- Golden x Lady Amherst's Pheasant (hybrid) Chrysolophus pictus x amherstiaeDetails:
- Summer x Western Tanager (hybrid) Piranga rubra x ludovicianaDetails:
- Yellow-throated x Blue-headed Vireo (hybrid) Vireo flavifrons x solitariusDetails:
- Tropical x Gray Kingbird (hybrid) Tyrannus melancholicus x dominicensisDetails:
- Graylag x Swan Goose (hybrid) Anser anser x cygnoidesDetails:
- Brown x Blue-footed Booby (hybrid) Sula leucogaster x nebouxiiDetails:
- Tricolored Heron x Snowy Egret (hybrid) Egretta tricolor x thulaDetails:
- White x Salmon-crested Cockatoo (hybrid) Cacatua alba x moluccensisDetails:
- Northern Shoveler x Mallard (hybrid) Spatula clypeata x Anas platyrhynchosDetails:
- Glaucous x Glaucous-winged Gull (hybrid) Larus hyperboreus x glaucescensDetails:
- Herring x California Gull (hybrid) Larus argentatus x californicusDetails:
- Yellow-breasted Chat x new world oriole sp. (hybrid) Icteria virens x Icterus sp.Details:
- Common x Arctic Tern (hybrid) Sterna hirundo x paradisaeaDetails:
- King x Clapper Rail (hybrid) Rallus elegans x crepitansDetails:
- Buff-breasted x White-rumped Sandpiper (hybrid) Calidris subruficollis x fuscicollisDetails:
- Dunlin x White-rumped Sandpiper (hybrid) Calidris alpina x fuscicollisDetails:
- Dark-eyed x Yellow-eyed Junco (hybrid) Junco hyemalis x phaeonotusDetails:
- Blue-winged Teal x American Wigeon (hybrid) Spatula discors x Mareca americanaDetails:
- Bullock's x Baltimore Oriole (hybrid) Icterus bullockii x galbula
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensis
- Varied x Painted Bunting (hybrid) Passerina versicolor x cirisDetails:
- Snowy x Little Egret (hybrid) Egretta thula x garzettaDetails:
- Red-crowned x Red-lored Parrot (hybrid) Amazona viridigenalis x autumnalisDetails:
- California x Crissal Thrasher (hybrid) Toxostoma redivivum x crissaleDetails:
- Grasshopper x Savannah Sparrow (hybrid) Ammodramus savannarum x Passerculus sandwichensisDetails:
- Ross's x Greater White-fronted Goose (hybrid) Anser rossii x albifronsDetails:
- Gadwall x Northern Pintail (hybrid) Mareca strepera x Anas acutaDetails:
- Curve-billed x Long-billed Thrasher (hybrid) Toxostoma curvirostre x longirostreDetails:
- Redhead x Lesser Scaup (hybrid) Aythya americana x affinisDetails:
- Gadwall x Green-winged Teal (hybrid) Mareca strepera x Anas creccaDetails:
- Indigo x Painted Bunting (hybrid) Passerina cyanea x cirisDetails:
- Mountain x Chestnut-backed Chickadee (hybrid) Poecile gambeli x rufescensDetails:
- Wood Duck x Mallard (hybrid) Aix sponsa x Anas platyrhynchosDetails:
- Blue-and-yellow x Scarlet Macaw (hybrid) Ara ararauna x macaoDetails:
- Herring x Glaucous Gull (hybrid) Larus argentatus x hyperboreusDetails:
- Northern Shoveler x American Wigeon (hybrid) Spatula clypeata x Mareca americanaDetails:
- Great Black-backed x Glaucous Gull (hybrid) Larus marinus x hyperboreusDetails:
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensis
- Common Gallinule x American Coot (hybrid) Gallinula galeata x Fulica americanaDetails:
- Canyon x Abert's Towhee (hybrid) Melozone fusca x abertiDetails:
- Ruddy x Common Shelduck (hybrid) Tadorna ferruginea x tadornaDetails:
- American Wigeon x Mallard (hybrid) Mareca americana x Anas platyrhynchosDetails:
- Kentucky Warbler x Common Yellowthroat (hybrid) Geothlypis formosa x trichasDetails:
- Green-tailed x Spotted Towhee (hybrid) Pipilo chlorurus x maculatusDetails:
- Northern Bobwhite x California Quail (hybrid) Colinus virginianus x Callipepla californicaDetails:
- Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyaneaDetails:
- Glaucous x Slaty-backed Gull (hybrid) Larus hyperboreus x schistisagusDetails:
- American Redstart x Northern Parula (hybrid) Setophaga ruticilla x americanaDetails:
- Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruber
- House x Eurasian Tree Sparrow (hybrid) Passer domesticus x montanusDetails:
- Yellow-crowned x Black-crowned Night Heron (hybrid) Nyctanassa violacea x Nycticorax nycticoraxDetails:
- MacGillivray's x Mourning Warbler (hybrid) Geothlypis tolmiei x philadelphiaDetails:
- Mourning Warbler x Common Yellowthroat (hybrid) Geothlypis philadelphia x trichasDetails:
- Yellow x Prairie Warbler (hybrid) Setophaga petechia x discolorDetails:
- Northern x Tropical Parula (hybrid) Setophaga americana x pitiayumiDetails:
- Black-chinned x Rufous Hummingbird (hybrid) Archilochus alexandri x Selasphorus rufusDetails:
- Western x Eastern Meadowlark (hybrid) Sturnella neglecta x magnaDetails:
- Sharp-tailed Grouse x Greater Prairie-Chicken (hybrid) Tympanuchus phasianellus x cupidoDetails:
- White-crowned x Golden-crowned Sparrow (hybrid) Zonotrichia leucophrys x atricapillaDetails:
- Redhead x Greater Scaup (hybrid) Aythya americana x marilaDetails:
- Greater Sage-Grouse x Sharp-tailed Grouse (hybrid) Centrocercus urophasianus x Tympanuchus phasianellusDetails:
- Northern x Gilded Flicker (hybrid) Colaptes auratus x chrysoidesDetails:
- Black x Say's Phoebe (hybrid) Sayornis nigricans x sayaDetails:
- Northern Cardinal x Pyrrhuloxia (hybrid) Cardinalis cardinalis x sinuatusDetails:
- Herring x Great Black-backed Gull (hybrid) Larus argentatus x marinusDetails:
- Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchosDetails:
- Mallard x Eastern Spot-billed Duck (hybrid) Anas platyrhynchos x zonorhynchaDetails:
- Snow x Cackling Goose (hybrid) Anser caerulescens x Branta hutchinsiiDetails:
- Yellow-bellied x Red-naped Sapsucker (hybrid) Sphyrapicus varius x nuchalisDetails:
- Canvasback x scaup sp. (hybrid) Aythya valisineria x marila/affinisDetails:
- Snow Goose x Brant (hybrid) Anser caerulescens x Branta berniclaDetails:
- Anna's Hummingbird x Selasphorus sp. (hybrid) Calypte anna x Selasphorus sp.Details:
- Canvasback x Redhead (hybrid) Aythya valisineria x americanaDetails:
- Eurasian Wigeon x Northern Pintail (hybrid) Mareca penelope x Anas acutaDetails:
- Emperor x Greater White-fronted Goose (hybrid) Anser canagicus x albifronsDetails:
- Red-shouldered x Broad-winged Hawk (hybrid) Buteo lineatus x platypterusDetails:
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosDetails:
- Yellow x Black-throated Blue Warbler (hybrid) Setophaga petechia x caerulescensDetails:
- Chipping x Field Sparrow (hybrid) Spizella passerina x pusillaDetails:
- American Redstart x Yellow Warbler (hybrid) Setophaga ruticilla x petechiaDetails:
- Palm x Yellow-rumped Warbler (hybrid) Setophaga palmarum x coronataDetails:
- Mallard x Mottled Duck (hybrid) Anas platyrhynchos x fulvigulaDetails:
- Costa's x Broad-billed Hummingbird (hybrid) Calypte costae x Cynanthus latirostrisDetails:
- Western x Eastern Wood-Pewee (hybrid) Contopus sordidulus x virensDetails:
- Swan Goose x Canada Goose (hybrid) Anser cygnoides x Branta canadensisDetails:
- Great Egret x Great Blue Heron (hybrid) Ardea alba x herodiasDetails:
- Crimson x Eastern Rosella (hybrid) Platycercus elegans x eximiusDetails:
- Eastern x Mountain Bluebird (hybrid) Sialia sialis x currucoidesDetails:
- Black x Eastern Phoebe (hybrid) Sayornis nigricans x phoebeDetails:
- House x Fish Crow (hybrid) Corvus splendens x ossifragus
- Rufous x Broad-tailed Hummingbird (hybrid) Selasphorus rufus x platycercusDetails:
- Scarlet Tanager x Rose-breasted Grosbeak (hybrid) Piranga olivacea x Pheucticus ludovicianusDetails:
- Snow x Greater White-fronted Goose (hybrid) Anser caerulescens x albifronsDetails:
- Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmusDetails:
- Summer x Scarlet Tanager (hybrid) Piranga rubra x olivaceaDetails:
- Eurasian Collared-Dove x Mourning Dove (hybrid) Streptopelia decaocto x Zenaida macrouraDetails:
- Magnolia x Palm Warbler (hybrid) Setophaga magnolia x palmarumDetails:
- Emperor x Cackling Goose (hybrid) Anser canagicus x Branta hutchinsiiDetails:
- King x Common Eider (hybrid) Somateria spectabilis x mollissimaDetails:
- Lesser x American Goldfinch (hybrid) Spinus psaltria x tristisDetails:
- Cape May x Yellow-rumped Warbler (hybrid) Setophaga tigrina x coronataDetails:
- Mallard x Hawaiian Duck (hybrid) Anas platyrhynchos x wyvillianaDetails:
- Chipping x Clay-colored Sparrow (hybrid) Spizella passerina x pallidaDetails:
- Glaucous-winged x Slaty-backed Gull (hybrid) Larus glaucescens x schistisagusDetails:
- Townsend's x Hermit Warbler (hybrid) Setophaga townsendi x occidentalisDetails:
- Golden-winged x Blue-winged Warbler (hybrid) Vermivora chrysoptera x cyanopteraDetails:
- Red-shouldered x Red-tailed Hawk (hybrid) Buteo lineatus x jamaicensisDetails:
- Chestnut-sided x Black-throated Blue Warbler (hybrid) Setophaga pensylvanica x caerulescensDetails:
- Cerulean Warbler x Northern Parula (hybrid) Setophaga cerulea x americanaDetails:
- Rufous x Allen's Hummingbird (hybrid) Selasphorus rufus x sasinDetails:
- Downy x Ladder-backed Woodpecker (hybrid) Dryobates pubescens x scalaris
- Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diaziDetails:
- Common x Barrow's Goldeneye (hybrid) Bucephala clangula x islandicaDetails:
- American Wigeon x American Black Duck (hybrid) Mareca americana x Anas rubripesDetails:
- Canyon x Spotted Towhee (hybrid) Melozone fusca x Pipilo maculatusDetails:
- Anna's x Allen's Hummingbird (hybrid) Calypte anna x Selasphorus sasinDetails:
- American x Black Oystercatcher (hybrid) Haematopus palliatus x bachmaniDetails:
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisDetails:
- Ross's x Cackling Goose (hybrid) Anser rossii x Branta hutchinsiiDetails:
- Ring-necked x Tufted Duck (hybrid) Aythya collaris x fuligulaDetails:
- Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkiiDetails:
- Little Blue x Tricolored Heron (hybrid) Egretta caerulea x tricolorDetails:
- Northern Bobwhite x Scaled Quail (hybrid) Colinus virginianus x Callipepla squamataDetails:
- Spectacled x King Eider (hybrid) Somateria fischeri x spectabilisDetails:
- Snow x McKay's Bunting (hybrid) Plectrophenax nivalis x hyperboreusDetails:
- Cliff x Cave Swallow (hybrid) Petrochelidon pyrrhonota x fulvaDetails:
- Yellow-rumped x Yellow-throated Warbler (hybrid) Setophaga coronata x dominicaDetails:
- Western x Eastern Screech-Owl (hybrid) Megascops kennicottii x asioDetails:
- Scaled x Gambel's Quail (hybrid) Callipepla squamata x gambeliiDetails:
- Common x Hoary Redpoll (hybrid) Acanthis flammea x hornemanniDetails:
- Hooded x Yellow Warbler (hybrid) Setophaga citrina x petechiaDetails:
- Yellow-rumped x Black-throated Gray Warbler (hybrid) Setophaga coronata x nigrescensDetails:
- Peregrine x Prairie Falcon (hybrid) Falco peregrinus x mexicanusDetails:
- Carolina x Black-capped Chickadee (hybrid) Poecile carolinensis x atricapillus
- Mallard x Redhead (hybrid) Anas platyrhynchos x Aythya americanaDetails:
- Cinnamon Teal x Northern Shoveler (hybrid) Spatula cyanoptera x clypeataDetails:
- Trumpeter x Whooper Swan (hybrid) Cygnus buccinator x cygnusDetails:
- Altamira x Audubon's Oriole (hybrid) Icterus gularis x graduacaudaDetails:
- Surf x White-winged Scoter (hybrid) Melanitta perspicillata x deglandiDetails:
- Spotted x Barred Owl (hybrid) Strix occidentalis x variaDetails:
- Painted x Slate-throated Redstart (hybrid) Myioborus pictus x miniatusDetails:
- Nelson's x Saltmarsh Sparrow (hybrid) Ammospiza nelsoni x caudacutaDetails:
- Calliope x Broad-tailed Hummingbird (hybrid) Selasphorus calliope x platycercusDetails:
- Warbling x Red-eyed Vireo (hybrid) Vireo gilvus x olivaceusDetails:
- goldeneye sp. x Hooded Merganser (hybrid) Bucephala clangula/islandica x Lophodytes cucullatusDetails:
- Couch's x Western Kingbird (hybrid) Tyrannus couchii x verticalisDetails:
- California x Gambel's Quail (hybrid) Callipepla californica x gambeliiDetails:
- Lucifer x Costa's Hummingbird (hybrid) Calothorax lucifer x Calypte costaeDetails:
- Common x Great-tailed Grackle (hybrid) Quiscalus quiscula x mexicanusDetails:
- Sandhill x Whooping Crane (hybrid) Antigone canadensis x Grus americanaDetails:
- Clay-colored x Brewer's Sparrow (hybrid) Spizella pallida x breweriDetails:
- Western x Flame-colored Tanager (hybrid) Piranga ludoviciana x bidentataDetails:
- Double-crested x Neotropic Cormorant (hybrid) Nannopterum auritum x brasilianumDetails:
- Ruby-throated x Broad-tailed Hummingbird (hybrid) Archilochus colubris x Selasphorus platycercusDetails:
- Blue-winged x Prairie Warbler (hybrid) Vermivora cyanoptera x Setophaga discolorDetails:
- Brant x Cackling Goose (hybrid) Branta bernicla x hutchinsiiDetails:
- Ross's x Canada Goose (hybrid) Anser rossii x Branta canadensisDetails:
- Wood Duck x Hooded Merganser (hybrid) Aix sponsa x Lophodytes cucullatusDetails:
- Common Yellowthroat x Rufous-capped Warbler (hybrid) Geothlypis trichas x Basileuterus rufifronsDetails:
- Dusky x Sharp-tailed Grouse (hybrid) Dendragapus obscurus x Tympanuchus phasianellusDetails:
- Tropical x Northern Mockingbird (hybrid) Mimus gilvus x polyglottos
- Red Crossbill x Pine Siskin (hybrid) Loxia curvirostra x Spinus pinusDetails:
- Golden-fronted x Red-bellied Woodpecker (hybrid) Melanerpes aurifrons x carolinusDetails:
- Great Knot x Surfbird (hybrid) Calidris tenuirostris x virgataDetails:
- Rose-breasted x Black-headed Grosbeak (hybrid) Pheucticus ludovicianus x melanocephalus
- Violet-green x Northern Rough-winged Swallow (hybrid) Tachycineta thalassina x Stelgidopteryx serripennisDetails:
- Thick-billed x Common Murre (hybrid) Uria lomvia x aalgeDetails:
- Snow x Ross's Goose (hybrid) Anser caerulescens x rossiiDetails:
- Laysan x Black-footed Albatross (hybrid) Phoebastria immutabilis x nigripes
- Sandhill x Common Crane (hybrid) Antigone canadensis x Grus grusDetails:
- Barnacle x Canada Goose (hybrid) Branta leucopsis x canadensis
- Lucifer x Anna's Hummingbird (hybrid) Calothorax lucifer x Calypte annaDetails:
- Tree x Violet-green Swallow (hybrid) Tachycineta bicolor x thalassinaDetails:
- Violet-green x Cliff Swallow (hybrid) Tachycineta thalassina x Petrochelidon pyrrhonotaDetails:
- Rivoli's x White-eared Hummingbird (hybrid) Eugenes fulgens x Hylocharis leucotisDetails:
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesDetails:
- Philadelphia x Red-eyed Vireo (hybrid) Vireo philadelphicus x olivaceusDetails:
- Western Kingbird x Scissor-tailed Flycatcher (hybrid) Tyrannus verticalis x forficatusDetails:
- Veery x Bicknell's Thrush (hybrid) Catharus fuscescens x bicknelliDetails:
- Common x Roseate Tern (hybrid) Sterna hirundo x dougalliiDetails:
- Song x Swamp Sparrow (hybrid) Melospiza melodia x georgianaDetails:
- Grace's x Black-throated Gray Warbler (hybrid) Setophaga graciae x nigrescensDetails:
- Common Yellowthroat x Yellow Warbler (hybrid) Geothlypis trichas x Setophaga petechiaDetails:
- White-winged x Yellow-chevroned Parakeet (hybrid) Brotogeris versicolurus x chiriri
- Gray-crowned x Common Yellowthroat (hybrid) Geothlypis poliocephala x trichasDetails:
- Rivoli's x Berylline Hummingbird (hybrid) Eugenes fulgens x Saucerottia beryllinaDetails:
- Hepatic x Flame-colored Tanager (hybrid) Piranga flava x bidentataDetails:
- Swainson's x Rough-legged Hawk (hybrid) Buteo swainsoni x lagopusDetails:
- Herring x Iceland Gull (hybrid) Larus argentatus x glaucoidesDetails:
- Clay-colored x Field Sparrow (hybrid) Spizella pallida x pusillaDetails:
- Western x Eastern Kingbird (hybrid) Tyrannus verticalis x tyrannusDetails:
- Brewer's Blackbird x Great-tailed Grackle (hybrid) Euphagus cyanocephalus x Quiscalus mexicanusDetails:
- Mountain x Boreal Chickadee (hybrid) Poecile gambeli x hudsonicusDetails:
- Tree x Barn Swallow (hybrid) Tachycineta bicolor x Hirundo rusticaDetails:
- Black-tailed x Black-capped Gnatcatcher (hybrid) Polioptila melanura x nigricepsDetails:
- Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanoptera
- Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensis
- Kelp x Herring Gull (hybrid) Larus dominicanus x argentatusDetails:
- Nuttall's x Hairy Woodpecker (hybrid) Dryobates nuttallii x villosusDetails:
- Gadwall x American Wigeon (hybrid) Mareca strepera x americanaDetails:
- Curlew x Pectoral Sandpiper (hybrid) Calidris ferruginea x melanotosDetails:
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescensDetails:
- Nuttall's x Ladder-backed Woodpecker (hybrid) Dryobates nuttallii x scalarisDetails:
- Northern Parula x Yellow-throated Warbler (hybrid) Setophaga americana x dominica
Additional Taxa (479)
- Common/Yellow-billed Loon Gavia immer/adamsii
- Antrostomus sp. Antrostomus sp.Details:
- Yellow-casqued/Black-casqued Hornbill Ceratogymna elata/atrataDetails:
- Hudsonian/Marbled Godwit Limosa haemastica/fedoaDetails:
- small plover sp. Charadrius/Anarhynchus sp.
- Eastern/Mexican Whip-poor-will Antrostomus vociferus/arizonaeDetails:
- Strix sp. Strix sp.Details:
- Summer/Scarlet Tanager Piranga rubra/olivacea
- Black-bellied Plover/golden-plover sp. Pluvialis sp.
- Aythya sp. Aythya sp.Details:
- myna/starling sp. Sturnidae sp.Details:
- Western/Eastern Cattle Egret Bubulcus ibis/coromandus
- pipit sp. Anthus sp.Details:
- Eurasian Moorhen/Common Gallinule Gallinula chloropus/galeataDetails:
- whistling-duck sp. Dendrocygna sp.Details:
- Domestic lovebird sp. (Domestic type) Agapornis sp. (Domestic type)Details:
- pigeon/dove sp. Columbidae sp.Details:
- estrildid finch sp. Estrildidae sp.Details:
- hawaiian honeycreeper sp. Drepanidinae sp.Details:
- crow sp. Corvus sp. (crow sp.)Details:
- Downy/Hairy Woodpecker Dryobates pubescens/villosus
- Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianumDetails:
- Masked/Ruddy Duck Nomonyx dominicus/Oxyura jamaicensisDetails:
- Psittacara sp. Psittacara sp.Details:
- Canyon/Abert's Towhee Melozone fusca/aberti
- American/Fish Crow Corvus brachyrhynchos/ossifragusDetails:
- Caprimulgus sp. Caprimulgus sp.
- blackbird sp. Icteridae sp.Details:
- lark sp. Alaudidae sp.Details:
- large shorebird sp. Scolopacidae sp. (large shorebird sp.)Details:
- Mexican/Mottled Duck Anas diazi/fulvigulaDetails:
- Thraupidae sp. Thraupidae sp.Details:
- Eurasian/American Wigeon Mareca penelope/americana
- black-and-white shearwater sp. Puffinus sp. (black-and-white shearwater sp.)
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusDetails:
- Western Cattle/Yellow-billed Egret Bubulcus ibis/Ardea brachyrhynchaDetails:
- Clay-colored/Brewer's Sparrow Spizella pallida/breweriDetails:
- Red-eyed/Yellow-green Vireo Vireo olivaceus/flavoviridisDetails:
- new world vulture sp. Cathartidae sp.Details:
- rail/crake sp. Rallidae sp. (rail/crake sp.)Details:
- Common/Spotted Sandpiper Actitis hypoleucos/maculariusDetails:
- small falcon sp. Falco sp. (small falcon sp.)Details:
- Purple/Rock Sandpiper Calidris maritima/ptilocnemisDetails:
- Orchard/Hooded Oriole Icterus spurius/cucullatusDetails:
- Ammospiza sp. Ammospiza sp.
- new world warbler sp. Parulidae sp.Details:
- passerine sp. Passeriformes sp.Details:
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataDetails:
- bird sp. Aves sp.Details:
- Tachycineta sp. Tachycineta sp.Details:
- Rufous/Allen's Hummingbird Selasphorus rufus/sasinDetails:
- Boreal/Northern Saw-whet Owl Aegolius funereus/acadicusDetails:
- yellowthroat sp. Geothlypis sp. (yellowthroat sp.)Details:
- swift sp. Apodidae sp.Details:
- MacGillivray's/Mourning Warbler Geothlypis tolmiei/philadelphiaDetails:
- Phylloscopus sp. Phylloscopus sp.Details:
- shearwater sp. Procellariidae sp. (shearwater sp.)Details:
- Gray-tailed/Wandering Tattler Tringa brevipes/incana
- booby sp. Sula sp.Details:
- Long-tailed/Pomarine Jaeger Stercorarius longicaudus/pomarinusDetails:
- Smooth-billed/Groove-billed Ani Crotophaga ani/sulcirostrisDetails:
- Brown/Black Noddy Anous stolidus/minutusDetails:
- Lazuli/Indigo Bunting Passerina amoena/cyaneaDetails:
- Herring/Lesser Black-backed Gull Larus argentatus/fuscusDetails:
- Red-necked/Little Stint Calidris ruficollis/minutaDetails:
- sand-plover sp. Anarhynchus atrifrons/mongolus/leschenaultiiDetails:
- Psittacula sp. Psittacula sp.Details:
- pygmy-owl/saw-whet owl sp. Glaucidium/Aegolius sp. (pygmy-owl/saw-whet owl sp.)Details:
- Cory's/Cape Verde Shearwater Calonectris diomedea/edwardsiiDetails:
- Chipping Sparrow/Worm-eating Warbler Spizella passerina/Helmitheros vermivorumDetails:
- Common/Antillean Nighthawk Chordeiles minor/gundlachiiDetails:
- Common/Oriental Cuckoo Cuculus canorus/optatusDetails:
- quail-dove sp. Geotrygon/Leptotrygon/Zentrygon sp.Details:
- Hepatic/Summer Tanager Piranga flava/rubraDetails:
- sparrow/warbler sp. (trilling song) Passerellidae/Parulidae sp. (trilling song)Details:
- Emberiza sp. Emberiza sp.Details:
- Gray/Dusky Flycatcher Empidonax wrightii/oberholseri
- old world quail sp. Synoicus/Coturnix sp.Details:
- Red-naped/Red-breasted Sapsucker Sphyrapicus nuchalis/ruber
- tanager sp. (Thraupidae sp.) Thraupidae sp. (tanager sp.)Details:
- Spotted/Barred Owl Strix occidentalis/variaDetails:
- Setophaga sp. Setophaga sp.Details:
- Peucaea sp. Peucaea sp.
- new world oriole sp. Icterus sp.Details:
- tanager sp. (Piranga sp.) Piranga sp.Details:
- Passerina sp. Passerina sp.Details:
- Red-eyed/Black-whiskered Vireo Vireo olivaceus/altiloquusDetails:
- moorhen/coot/gallinule sp. Gallinula/Fulica/Porphyrio sp.
- Northern/Tropical Parula Setophaga americana/pitiayumiDetails:
- Ring-necked/Green Pheasant Phasianus colchicus/versicolorDetails:
- Red-crowned/Lilac-crowned Parrot Amazona viridigenalis/finschiDetails:
- Snow/Ross's Goose Anser caerulescens/rossiiDetails:
- Dark-eyed Junco/Pine Warbler Junco hyemalis/Setophaga pinusDetails:
- Bronzed/Brown-headed Cowbird Molothrus aeneus/aterDetails:
- nuthatch sp. Sitta sp.Details:
- harrier sp. Circus sp.Details:
- House/Eurasian Tree Sparrow Passer domesticus/montanusDetails:
- corvid sp. Corvidae sp.Details:
- gull/tern sp. Laridae sp.Details:
- raven sp. Corvus sp. (raven sp.)Details:
- parakeet sp. Psittaciformes sp. (parakeet sp.)Details:
- Pycnonotus sp. Pycnonotus sp.Details:
- Oriental/Eurasian Magpie Pica serica/picaDetails:
- Long-eared/Short-eared Owl Asio otus/flammeus
- towhee sp. Melozone/Pipilo sp.Details:
- eclectus sp. Eclectus sp.Details:
- Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenysDetails:
- dabbling duck sp. Anatidae sp. (dabbling duck sp.)Details:
- parrot sp. Psittaciformes sp. (parrot sp.)Details:
- whydah sp. Vidua sp. (whydah sp.)Details:
- wagtail sp. Motacilla sp.Details:
- parid sp. Paridae sp.Details:
- Lincoln's/Swamp Sparrow Melospiza lincolnii/georgianaDetails:
- Masked/Nazca Booby Sula dactylatra/grantiDetails:
- Accipiter sp. Accipiter sp.Details:
- LeConte's/Nelson's Sparrow Ammospiza leconteii/nelsoniDetails:
- new world martin sp. (Progne sp.) Progne sp.Details:
- new world goldfinch sp. Spinus sp. (goldfinch sp.)Details:
- waterfowl sp. Anatidae sp.Details:
- Tropical/Couch's Kingbird Tyrannus melancholicus/couchii
- Mallard/Mottled Duck Anas platyrhynchos/fulvigulaDetails:
- Toxostoma sp. Toxostoma sp.
- Black/Pigeon Guillemot Cepphus grylle/columbaDetails:
- grebe sp. Podicipedidae sp.Details:
- Elegant/Royal Tern Thalasseus elegans/maximus
- lapwing sp. Vanellus sp.Details:
- corella/white cockatoo sp. Cacatua sp.Details:
- murrelet sp. Brachyramphus/Synthliboramphus sp.Details:
- Bullock's/Black-backed Oriole Icterus bullockii/abeilleiDetails:
- old world warbler sp. Passeriformes sp. (Old World warbler sp.)Details:
- Tundra/Whooper Swan Cygnus columbianus/cygnusDetails:
- Common Ringed/Semipalmated Plover Charadrius hiaticula/semipalmatusDetails:
- Townsend's/Hermit Warbler Setophaga townsendi/occidentalisDetails:
- lovebird sp. Agapornis sp.Details:
- owl sp. Strigiformes sp.Details:
- Nuttall's/Ladder-backed Woodpecker Dryobates nuttallii/scalaris
- tropicbird sp. Phaethon sp.Details:
- small swift sp. Apodidae sp. (small swift sp.)Details:
- Shiny/Bronzed Cowbird Molothrus bonariensis/aeneusDetails:
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusDetails:
- large macaw sp. Ara sp.Details:
- Bridled/Juniper Titmouse Baeolophus wollweberi/ridgwayi
- House/Italian Sparrow Passer domesticus/italiae
- Purple/Cassin's Finch Haemorhous purpureus/cassiniiDetails:
- Greater/Lesser White-fronted Goose Anser albifrons/erythropusDetails:
- Red-billed/Red-tailed Tropicbird Phaethon aethereus/rubricauda
- Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
- swamphen sp. Porphyrio sp. (swamphen sp.)Details:
- white-winged gull sp. Larus sp. (white-winged gull sp.)Details:
- Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
- snipe sp. Gallinago sp.Details:
- Acanthis/Spinus sp. Acanthis/Spinus sp.Details:
- Red-shouldered/Broad-winged Hawk Buteo lineatus/platypterusDetails:
- merganser sp. Mergellus/Lophodytes/Mergus sp.Details:
- American/Black Oystercatcher Haematopus palliatus/bachmaniDetails:
- large rail sp. Rallus sp. (large Rallus sp.)Details:
- Rallus sp. Rallus sp.Details:
- oystercatcher sp. Haematopus sp.Details:
- falcon sp. Falco sp.Details:
- Red-legged/Rock Partridge Alectoris rufa/graecaDetails:
- Aquila sp. Aquila sp.Details:
- Bullock's/Baltimore Oriole Icterus bullockii/galbulaDetails:
- Leiothlypis sp. Leiothlypis sp.Details:
- Black-throated Gray/Townsend's/Hermit Warbler Setophaga nigrescens/townsendi/occidentalisDetails:
- Tyrannus sp. Tyrannus sp.Details:
- hummingbird sp. Trochilidae sp.Details:
- California/Woodhouse's Scrub-Jay Aphelocoma californica/woodhouseii
- White-winged/Stejneger's Scoter Melanitta deglandi/stejnegeriDetails:
- Red/Cassia Crossbill Loxia curvirostra/sinesciurisDetails:
- elaenia sp. (genus Elaenia) Elaenia sp.Details:
- auklet sp. Ptychoramphus/Aethia sp.Details:
- Sooty/Bridled Tern Onychoprion fuscatus/anaethetusDetails:
- Downy/Ladder-backed Woodpecker Dryobates pubescens/scalaris
- new world flycatcher sp. Tyrannidae sp.Details:
- White-crowned/White-throated Sparrow Zonotrichia leucophrys/albicollisDetails:
- Herring/Glaucous-winged Gull Larus argentatus/glaucescensDetails:
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisDetails:
- Laughing/Franklin's Gull Leucophaeus atricilla/pipixcanDetails:
- Calidris sp. Calidris sp.Details:
- Vidua sp. Vidua sp.Details:
- Herring/Iceland Gull Larus argentatus/glaucoides
- redpoll sp. Acanthis sp.Details:
- Great/Double-crested Cormorant Phalacrocorax carbo/Nannopterum auritumDetails:
- rosy-finch sp. Leucosticte sp.Details:
- Lesser/Greater Roadrunner Geococcyx velox/californianusDetails:
- pelican sp. Pelecanus sp.Details:
- Common/Hoary Redpoll Acanthis flammea/hornemanniDetails:
- Common/Black Scoter Melanitta nigra/americanaDetails:
- Red-winged/Tricolored Blackbird Agelaius phoeniceus/tricolorDetails:
- California/Gambel's Quail Callipepla californica/gambeliiDetails:
- Yellow-legged/Lesser Black-backed Gull Larus michahellis/fuscusDetails:
- kingfisher sp. Alcedinidae sp.Details:
- Common/Barrow's Goldeneye Bucephala clangula/islandica
- Columba sp. Columba sp.Details:
- Common/Short-billed Gull Larus canus/brachyrhynchus
- ibis sp. Threskiornithidae sp. (ibis sp.)Details:
- grouse sp. Tetraoninae sp.
- Anas sp. Anas sp.Details:
- Varied Thrush/American Robin Ixoreus naevius/Turdus migratoriusDetails:
- Ploceus sp. Ploceus sp.Details:
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaDetails:
- Dark-eyed/Yellow-eyed Junco Junco hyemalis/phaeonotusDetails:
- gull sp. Larinae sp.Details:
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliDetails:
- Bank Swallow/Pale Martin Riparia riparia/dilutaDetails:
- swallow sp. Hirundinidae sp.Details:
- Buteo sp. Buteo sp.Details:
- Forpus sp. Forpus sp.Details:
- Gray-streaked/Dark-sided Flycatcher Muscicapa griseisticta/sibiricaDetails:
- Forster's/Common Tern Sterna forsteri/hirundoDetails:
- Leach's/Townsend's Storm-Petrel Hydrobates leucorhous/socorroensisDetails:
- Botteri's/Cassin's Sparrow Peucaea botterii/cassinii
- Common/Arctic Tern Sterna hirundo/paradisaeaDetails:
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanopteraDetails:
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvus
- Black-throated Gray/Townsend's Warbler Setophaga nigrescens/townsendiDetails:
- Pheucticus sp. Pheucticus sp.Details:
- small bittern sp. Ixobrychus sp.Details:
- Black-throated Gray/Hermit Warbler Setophaga nigrescens/occidentalisDetails:
- shorebird sp. Charadriiformes sp.Details:
- vireo sp. Vireo sp.Details:
- large falcon sp. Falco sp. (large falcon sp.)Details:
- Tree/Violet-green Swallow Tachycineta bicolor/thalassinaDetails:
- Black-throated/White-throated Magpie-Jay Calocitta colliei/formosaDetails:
- coot sp. Fulica sp.Details:
- Parus sp. Parus sp.Details:
- pheasant sp. Phasianidae sp. (pheasant sp.)Details:
- francolin/spurfowl sp. Phasianidae sp. (francolin/spurfowl sp.)Details:
- new world quail sp. Odontophoridae sp.Details:
- Great/Medium Egret Ardea alba/intermediaDetails:
- Amazona sp. Amazona sp.
- Melanerpes sp. Melanerpes sp.
- Buteo/eagle sp. Buteo/eagle sp.
- Ash-throated/Nutting's Flycatcher Myiarchus cinerascens/nuttingiDetails:
- Bubo sp. Bubo sp.Details:
- Rock/Band-tailed Pigeon Columba livia/Patagioenas fasciata
- Ruffed/Spruce Grouse Bonasa umbellus/Canachites canadensisDetails:
- wren sp. Troglodytidae sp.Details:
- Glossy/White-faced Ibis Plegadis falcinellus/chihiDetails:
- white-eye sp. Zosteropidae sp.Details:
- Mallard/Hawaiian Duck Anas platyrhynchos/wyvilliana
- Sedge/Marsh Wren Cistothorus stellaris/palustris
- Ridgway's/Mangrove/Clapper Rail Rallus obsoletus/longirostris/crepitansDetails:
- King/Virginia Rail Rallus elegans/limicola
- Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmusDetails:
- gnatcatcher sp. Polioptila sp.Details:
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiDetails:
- nightjar sp. Caprimulgidae sp.Details:
- Thalasseus sp. Thalasseus sp.Details:
- Mississippi/Plumbeous Kite Ictinia mississippiensis/plumbeaDetails:
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusDetails:
- Tropical/Northern Mockingbird Mimus gilvus/polyglottosDetails:
- Cooper's Hawk/American Goshawk Accipiter cooperii/atricapillus
- Curve-billed/Bendire's Thrasher Toxostoma curvirostre/bendirei
- Northern/Great Gray Shrike Lanius borealis/excubitorDetails:
- goose sp. Anatidae (goose sp.)Details:
- Velvet/White-winged/Stejneger's Scoter Melanitta fusca/deglandi/stejnegeri
- ground dove/Inca Dove Columbina sp.
- Anser sp. Anser sp.Details:
- Oak/Juniper Titmouse (Plain Titmouse) Baeolophus inornatus/ridgwayiDetails:
- longspur sp. Calcarius/Rhynchophanes sp.Details:
- Scarlet-fronted/Cordilleran Parakeet Psittacara wagleri/frontatusDetails:
- American Black/Mottled Duck Anas rubripes/fulvigulaDetails:
- Scolopacidae sp. Scolopacidae sp.Details:
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Details:
- Procellaria sp. Procellaria sp.Details:
- bluebird sp. Sialia sp.Details:
- Boat-tailed/Great-tailed Grackle Quiscalus major/mexicanusDetails:
- paradise-whydah sp. Vidua sp. (paradise-whydah sp.)Details:
- Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalis
- finch sp. Fringillidae sp.Details:
- jay sp. Corvidae sp. (jay sp.)Details:
- Patagioenas sp. Patagioenas sp.Details:
- Horned/Eared Grebe Podiceps auritus/nigricollisDetails:
- Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
- Hydrobates sp. Hydrobates sp.Details:
- Aphelocoma sp. Aphelocoma sp.Details:
- stork sp. Ciconiidae sp.Details:
- Japanese Leaf/Arctic/Kamchatka Leaf Warbler Phylloscopus xanthodryas/borealis/examinandusDetails:
- Arctic/Pacific Loon Gavia arctica/pacificaDetails:
- American/Greater Flamingo Phoenicopterus ruber/roseusDetails:
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaDetails:
- peep sp. Calidris sp. (peep sp.)
- mimid sp. Mimidae sp.Details:
- Mallard/American Black Duck Anas platyrhynchos/rubripesDetails:
- shrike sp. Lanius sp.Details:
- Zonotrichia sp. Zonotrichia sp.
- frigatebird sp. Fregata sp.Details:
- Grasshopper/Henslow's Sparrow Ammodramus savannarum/Centronyx henslowiiDetails:
- Turdus sp. Turdus sp.Details:
- King/Common Eider Somateria spectabilis/mollissimaDetails:
- Eurasian/African Collared-Dove Streptopelia decaocto/roseogrisea
- Ardea sp. Ardea sp.Details:
- procellariid sp. Procellariidae sp.Details:
- Glaucidium sp. Glaucidium sp.Details:
- plover sp. Charadriidae sp.Details:
- grackle sp. Quiscalus sp.Details:
- phalarope sp. Phalaropus sp.Details:
- Lonchura sp. Lonchura sp.Details:
- Myioborus sp. Myioborus sp.Details:
- Loggerhead/Northern Shrike Lanius ludovicianus/borealisDetails:
- screech-owl sp. Megascops sp.Details:
- Red-eyed/Chivi Vireo Vireo olivaceus/chiviDetails:
- Common/Ruddy Ground Dove Columbina passerina/talpacotiDetails:
- Greater/Lesser Scaup Aythya marila/affinisDetails:
- Anna's/Costa's Hummingbird Calypte anna/costae
- eider sp. Somateria sp.Details:
- crow/raven sp. Corvus sp.Details:
- Mallard/Mexican Duck Anas platyrhynchos/diazi
- Streptopelia sp. Streptopelia sp.
- Cookilaria petrel sp. Pterodroma sp. (Cookilaria sp.)
- hawk sp. Accipitridae sp. (hawk sp.)Details:
- Golden-fronted/Red-bellied Woodpecker Melanerpes aurifrons/carolinus
- Dusky/Sooty Grouse Dendragapus obscurus/fuliginosusDetails:
- Myiarchus sp. Myiarchus sp.Details:
- puffin sp. Fratercula sp.Details:
- cuckoo sp. (Cuculidae sp.) Cuculidae sp.Details:
- Chimney/Vaux's Swift Chaetura pelagica/vauxiDetails:
- sulid sp. Sulidae sp.Details:
- Cathartes sp. Cathartes sp.Details:
- cormorant sp. Phalacrocoracidae sp.Details:
- Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalusDetails:
- House/Purple Finch Haemorhous mexicanus/purpureus
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiDetails:
- Zosterops sp. Zosterops sp.Details:
- Hen/Northern Harrier Circus cyaneus/hudsonius
- Western/Chihuahuan Meadowlark Sturnella neglecta/lilianaeDetails:
- Brotogeris sp. Brotogeris sp.Details:
- Cackling/Canada Goose Branta hutchinsii/canadensis
- Podiceps sp. Podiceps sp.Details:
- Greater/Lesser Prairie-Chicken Tympanuchus cupido/pallidicinctus
- Passer sp. Passer sp.Details:
- Leach's/Townsend's/Ainley's Storm-Petrel Hydrobates leucorhous/socorroensis/cheimomnestesDetails:
- Petrochelidon sp. Petrochelidon sp.Details:
- storm-petrel sp. (dark-rumped) Oceanitidae/Hydrobatidae sp. (dark-rumped)Details:
- Spizella sp. Spizella sp.Details:
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisDetails:
- white egret sp. Egretta/Bubulcus/Ardea sp.Details:
- Philadelphia/Red-eyed Vireo Vireo philadelphicus/olivaceusDetails:
- Yellow-footed/Western Gull Larus livens/occidentalisDetails:
- alcid sp. Alcidae sp.Details:
- Zino's/Fea's Petrel Pterodroma madeira/feae
- Galapagos/Hawaiian Petrel (Dark-rumped Petrel) Pterodroma phaeopygia/sandwichensisDetails:
- flamingo sp. Phoenicopteridae sp.Details:
- albatross sp. Diomedeidae sp.Details:
- Surf/Black Scoter Melanitta perspicillata/americanaDetails:
- swan sp. Cygnus sp.Details:
- Snow/McKay's Bunting Plectrophenax nivalis/hyperboreusDetails:
- Common/Red-breasted Merganser Mergus merganser/serrator
- thrush sp. Turdidae sp.Details:
- Trumpeter/Tundra Swan Cygnus buccinator/columbianusDetails:
- Spinus sp. Spinus sp.Details:
- Red/Red-necked Phalarope Phalaropus fulicarius/lobatusDetails:
- woodpecker sp. Picidae sp.Details:
- Coccyzus sp. Coccyzus sp.Details:
- Chaetura sp. Chaetura sp.Details:
- nighthawk sp. Chordeiles sp.Details:
- large swift sp. Apodidae sp. (large swift sp.)Details:
- pewee sp. (Contopus sp.) Contopus sp.
- Larus sp. Larus sp.Details:
- Thick-billed/Common Murre Uria lomvia/aalge
- Black-legged/Red-legged Kittiwake Rissa tridactyla/brevirostris
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaDetails:
- Western/Semipalmated Sandpiper Calidris mauri/pusillaDetails:
- cordonbleu sp. Uraeginthus sp.Details:
- Grasshopper/Baird's Sparrow Ammodramus savannarum/Centronyx bairdiiDetails:
- jaeger/skua sp. Stercorarius sp.
- Western/Eastern Wood-Pewee Contopus sordidulus/virensDetails:
- large albatross sp. Diomedea sp.Details:
- Chlidonias sp. Chlidonias sp.Details:
- Empidonax sp. Empidonax sp.Details:
- ptarmigan sp. Lagopus sp.Details:
- loon sp. Gavia sp.Details:
- Geranoaetus/Buteo sp. Geranoaetus/Buteo sp.Details:
- Bohemian/Cedar Waxwing Bombycilla garrulus/cedrorumDetails:
- large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.
- Cliff/Cave Swallow Petrochelidon pyrrhonota/fulva
- Leach's/Townsend's Storm-Petrel (dark-rumped) Hydrobates leucorhous/socorroensis (dark-rumped)
- Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticusDetails:
- waxbill sp. Estrilda sp.Details:
- eagle sp. Accipitridae sp. (eagle sp.)Details:
- Sagebrush/Bell's Sparrow (Sage Sparrow) Artemisiospiza nevadensis/belliDetails:
- Little/Least Tern Sternula albifrons/antillarum
- crossbill sp. Loxia sp.Details:
- new world sparrow sp. Passerellidae sp.
- Euplectes sp. Euplectes sp.Details:
- Cypseloides sp. Cypseloides sp.
- Tufted/Black-crested Titmouse Baeolophus bicolor/atricristatus
- Branta sp. Branta sp.Details:
- Common/Wilson's Snipe Gallinago gallinago/delicata
- Haemorhous sp. Haemorhous sp.
- Cassin's/Western Kingbird Tyrannus vociferans/verticalisDetails:
- teal sp. Anatidae sp. (teal sp.)Details:
- large tern sp. Hydroprogne/Thalasseus sp.Details:
- Dryobates sp. Dryobates sp.Details:
- sapsucker sp. Sphyrapicus sp.
- chickadee sp. Poecile sp.
- large alcid sp. Alca/Uria sp.Details:
- yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)Details:
- Pterodroma sp. Pterodroma sp.Details:
- Sterna sp. Sterna sp.Details:
- Scripps's/Guadalupe Murrelet (Xantus's Murrelet) Synthliboramphus scrippsi/hypoleucus
- Greater/Gunnison Sage-Grouse Centrocercus urophasianus/minimusDetails:
- Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostrisDetails:
- Shiny/Brown-headed Cowbird Molothrus bonariensis/ater
- small albatross sp. Thalassarche sp.Details:
- Western/Eastern Meadowlark Sturnella neglecta/magnaDetails:
- Sporophila sp. Sporophila sp.Details:
- Leach's/Townsend's Storm-Petrel (white-rumped) Hydrobates leucorhous/socorroensis (white-rumped)
- Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalusDetails:
- Pica sp. Pica sp.Details:
- tern sp. Sterninae sp.Details:
- American Three-toed/Black-backed Woodpecker Picoides dorsalis/arcticusDetails:
- Eastern/Chihuahuan Meadowlark Sturnella magna/lilianae
- Western/Eastern Yellow Wagtail Motacilla flava/tschutschensisDetails:
- Atlantic/Indian Yellow-nosed Albatross Thalassarche chlororhynchos/carteriDetails:
- Catharus sp. Catharus sp.Details:
- Trindade/Herald Petrel Pterodroma arminjoniana/heraldicaDetails:
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriDetails:
- Garganey/Green-winged Teal Spatula querquedula/Anas creccaDetails:
- White-capped/Salvin's/Chatham Albatross Thalassarche cauta/salvini/eremita
- Taiga/Tundra Bean-Goose Anser fabalis/serrirostrisDetails:
- Sturnella meadowlark sp. Sturnella sp.Details:
- Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandri
- Arctic/Kamchatka Leaf Warbler Phylloscopus borealis/examinandusDetails:
- Pacific/Winter Wren Troglodytes pacificus/hiemalisDetails:
- Eurasian/Oriental Skylark Alauda arvensis/gulgulaDetails:
- scoter sp. Melanitta sp.Details:
- Scripps's/Guadalupe/Craveri's Murrelet Synthliboramphus scrippsi/hypoleucus/craveriDetails:
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiDetails:
- Morelet's/Cinnamon-rumped Seedeater Sporophila morelleti/torqueolaDetails:
- storm-petrel sp. Oceanitidae/Hydrobatidae sp.
- solitary vireo sp. Vireo cassinii/solitarius/plumbeusDetails:
- Western/Glaucous-winged Gull Larus occidentalis/glaucescens
- Siberian/Amur Stonechat Saxicola maurus/stejnegeriDetails:
- Tringa sp. Tringa sp.
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacutaDetails:
- Brown/Long-billed Thrasher Toxostoma rufum/longirostreDetails:
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillus
- Dusky/Naumann's Thrush Turdus eunomus/naumanniDetails:
- Red-whiskered/Red-vented Bulbul Pycnonotus jocosus/cafer
- Northern Cardinal/Pyrrhuloxia Cardinalis cardinalis/sinuatusDetails:
- jaeger sp. Stercorarius sp. (jaeger sp.)Details:
- skua sp. Stercorarius sp. (skua sp.)Details:
- Streaked/Sulphur-bellied Flycatcher Myiodynastes maculatus/luteiventrisDetails:
- Snowy/Kentish Plover Anarhynchus nivosus/alexandrinusDetails:
- vireo sp. (Red-eyed Vireo complex) Vireo sp. (Red-eyed Vireo complex)Details:
- rainbow lorikeet sp. Trichoglossus sp. (rainbow lorikeet complex)
- Tree/Olive-backed Pipit Anthus trivialis/hodgsoniDetails:
- Hydrobates sp. (Band-rumped complex) Hydrobates sp. (Band-rumped complex)Details:
- Cassin's/Blue-headed Vireo Vireo cassinii/solitarius
- Sharp-tailed/Pectoral Sandpiper Calidris acuminata/melanotos
- White-winged/Yellow-chevroned Parakeet Brotogeris versicolurus/chiririDetails:
- golden-plover sp. Pluvialis dominica/apricaria/fulva
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.Details:
- diurnal raptor sp. Accipitriformes/Falconiformes sp.Details:
- large toucan sp. Ramphastos sp.Details:
- Cassin's/Plumbeous Vireo Vireo cassinii/plumbeusDetails:
- Northern/Gilded Flicker Colaptes auratus/chrysoides
- heron sp. Ardeidae sp.Details:
- Timaliidae sp. Timaliidae sp.Details:
- Scripps's/Craveri's Murrelet Synthliboramphus scrippsi/craveriDetails:
- Serinus sp. Serinus sp.Details:
- duck sp. Anatidae (duck sp.)Details:
- American/Pacific Golden-Plover (Lesser Golden-Plover) Pluvialis dominica/fulva
- storm-petrel sp. (white-rumped) Oceanitidae/Hydrobatidae sp. (white-rumped)Details:
- crane sp. Gruidae sp.Details:
- Selasphorus sp. Selasphorus sp.Details:
- Cuculus sp. Cuculus sp.Details:
- Connecticut/MacGillivray's/Mourning Warbler Oporornis/Geothlypis sp. (Mourning-type)Details:
- chachalaca sp. Ortalis sp.Details:
- Snowy/Tristan/Antipodean Albatross Diomedea exulans/dabbenena/antipodensisDetails:
- Asio sp. Asio sp.Details:
- godwit sp. Limosa sp.
- King/Clapper Rail Rallus elegans/crepitansDetails:
- stilt/avocet sp. Recurvirostridae sp.
- curlew sp. Numenius sp.
- phoebe sp. Sayornis sp.
- hornbill sp. Bucerotidae sp.Details: