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Native and Naturalized (796)
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Exotic: Provisional (17)
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Exotic: Escapee (12)
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Hybrids (51)
- Graylag x Swan Goose (hybrid) Anser anser x cygnoidesDetails:
- Swan Goose x Canada Goose (hybrid) Anser cygnoides x Branta canadensis
- Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescens
- Carolina x Black-capped Chickadee (hybrid) Poecile carolinensis x atricapillus
- Northern x Tropical Parula (hybrid) Setophaga americana x pitiayumiDetails:
- Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchosDetails:
- Mallard x Hawaiian Duck (hybrid) Anas platyrhynchos x wyvilliana
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescens
- Tufted x Black-crested Titmouse (hybrid) Baeolophus bicolor x atricristatus
- House x Eurasian Tree Sparrow (hybrid) Passer domesticus x montanusDetails:
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensisDetails:
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensis
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensis
- Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanoptera
- Blue-winged Teal x Northern Shoveler (hybrid) Spatula discors x clypeataDetails:
- Wood Duck x Mallard (hybrid) Aix sponsa x Anas platyrhynchosDetails:
- Mallard x Mexican Duck (hybrid) Anas platyrhynchos x diaziDetails:
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripes
- Mallard x Mottled Duck (hybrid) Anas platyrhynchos x fulvigula
- Redhead x Ring-necked Duck (hybrid) Aythya americana x collarisDetails:
- Tufted Duck x Lesser Scaup (hybrid) Aythya fuligula x affinisDetails:
- California x Gambel's Quail (hybrid) Callipepla californica x gambeliiDetails:
- Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkiiDetails:
- Lucifer x Black-chinned Hummingbird (hybrid) Calothorax lucifer x Archilochus alexandriDetails:
- Black-chinned x Broad-tailed Hummingbird (hybrid) Archilochus alexandri x Selasphorus platycercusDetails:
- Calliope x Broad-tailed Hummingbird (hybrid) Selasphorus calliope x platycercusDetails:
- Anna's x Broad-billed Hummingbird (hybrid) Calypte anna x Cynanthus latirostrisDetails:
- American x Black Oystercatcher (hybrid) Haematopus palliatus x bachmaniDetails:
- Glaucous x Glaucous-winged Gull (hybrid) Larus hyperboreus x glaucescens
- Snowy x Little Egret (hybrid) Egretta thula x garzettaDetails:
- Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihiDetails:
- Common Black x Red-shouldered Hawk (hybrid) Buteogallus anthracinus x Buteo lineatusDetails:
- Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruber
- Downy x Nuttall's Woodpecker (hybrid) Dryobates pubescens x nuttalliiDetails:
- Nuttall's x Ladder-backed Woodpecker (hybrid) Dryobates nuttallii x scalarisDetails:
- Red-crowned x Lilac-crowned Parrot (hybrid) Amazona viridigenalis x finschi
- Black x Eastern Phoebe (hybrid) Sayornis nigricans x phoebe
- Barn x Cliff Swallow (hybrid) Hirundo rustica x Petrochelidon pyrrhonotaDetails:
- Nelson's x Saltmarsh Sparrow (hybrid) Ammospiza nelsoni x caudacutaDetails:
- Canyon x Abert's Towhee (hybrid) Melozone fusca x abertiDetails:
- Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmusDetails:
- Bullock's x Baltimore Oriole (hybrid) Icterus bullockii x galbulaDetails:
- Golden-winged x Blue-winged Warbler (hybrid) Vermivora chrysoptera x cyanopteraDetails:
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Details:
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Details:
- Colima x Virginia's Warbler (hybrid) Leiothlypis crissalis x virginiaeDetails:
- Yellow-rumped x Yellow-throated Warbler (hybrid) Setophaga coronata x dominicaDetails:
- Townsend's x Hermit Warbler (hybrid) Setophaga townsendi x occidentalisDetails:
- Rose-breasted x Black-headed Grosbeak (hybrid) Pheucticus ludovicianus x melanocephalusDetails:
- Lazuli x Indigo Bunting (hybrid) Passerina amoena x cyaneaDetails:
- Rufous x Allen's Hummingbird (hybrid) Selasphorus rufus x sasinDetails:
Additional Taxa (265)
- Brown/Black Noddy Anous stolidus/minutusDetails:
- Black-legged/Red-legged Kittiwake Rissa tridactyla/brevirostris
- Boat-tailed/Great-tailed Grackle Quiscalus major/mexicanus
- goose sp. Anatidae (goose sp.)
- scoter sp. Melanitta sp.
- Thick-billed/Common Murre Uria lomvia/aalge
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleuca
- waterfowl sp. Anatidae sp.Details:
- Western/Semipalmated Sandpiper Calidris mauri/pusilla
- peep sp. Calidris sp. (peep sp.)
- Common/Arctic Tern Sterna hirundo/paradisaea
- Snow/Ross's Goose Anser caerulescens/rossiiDetails:
- shearwater sp. Procellariidae sp. (shearwater sp.)Details:
- Red/Cassia Crossbill Loxia curvirostra/sinesciuris
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceus
- phalarope sp. Phalaropus sp.
- white-winged gull sp. Larus sp. (white-winged gull sp.)Details:
- Sterna sp. Sterna sp.
- Glossy/White-faced Ibis Plegadis falcinellus/chihi
- large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.Details:
- chickadee sp. Poecile sp.
- grebe sp. Podicipedidae sp.
- Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianum
- teal sp. Anatidae sp. (teal sp.)
- California/Gambel's Quail Callipepla californica/gambelii
- large tern sp. Hydroprogne/Thalasseus sp.
- Great/Double-crested Cormorant Phalacrocorax carbo/Nannopterum auritum
- American/Fish Crow Corvus brachyrhynchos/ossifragus
- crow sp. Corvus sp. (crow sp.)Details:
- Bronzed/Brown-headed Cowbird Molothrus aeneus/ater
- tern sp. Sterninae sp.
- eider sp. Somateria sp.
- auklet sp. Ptychoramphus/Aethia sp.
- large alcid sp. Alca/Uria sp.
- Herring/Glaucous-winged Gull Larus argentatus/glaucescens
- booby sp. Sula sp.Details:
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violacea
- white egret sp. Egretta/Bubulcus/Ardea sp.
- Amazona sp. Amazona sp.Details:
- parakeet sp. Psittaciformes sp. (parakeet sp.)Details:
- Ammospiza sp. Ammospiza sp.Details:
- Mallard/Mottled Duck Anas platyrhynchos/fulvigula
- Common/Red-breasted Merganser Mergus merganser/serrator
- murrelet sp. Brachyramphus/Synthliboramphus sp.
- Larus sp. Larus sp.
- Forster's/Common Tern Sterna forsteri/hirundo
- Western/Eastern Cattle Egret Bubulcus ibis/coromandusDetails:
- Empidonax sp. Empidonax sp.
- swallow sp. Hirundinidae sp.
- Haemorhous sp. Haemorhous sp.
- longspur sp. Calcarius/Rhynchophanes sp.
- tanager sp. (Piranga sp.) Piranga sp.
- Surf/Black Scoter Melanitta perspicillata/americanaDetails:
- merganser sp. Mergellus/Lophodytes/Mergus sp.
- duck sp. Anatidae (duck sp.)
- large swift sp. Apodidae sp. (large swift sp.)Details:
- godwit sp. Limosa sp.Details:
- Red/Red-necked Phalarope Phalaropus fulicarius/lobatusDetails:
- jaeger sp. Stercorarius sp. (jaeger sp.)Details:
- alcid sp. Alcidae sp.
- Laughing/Franklin's Gull Leucophaeus atricilla/pipixcan
- Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostris
- cormorant sp. Phalacrocoracidae sp.
- Cliff/Cave Swallow Petrochelidon pyrrhonota/fulva
- Red-whiskered/Red-vented Bulbul Pycnonotus jocosus/cafer
- Sagebrush/Bell's Sparrow (Sage Sparrow) Artemisiospiza nevadensis/belliDetails:
- Chipping Sparrow/Worm-eating Warbler Spizella passerina/Helmitheros vermivorumDetails:
- Townsend's/Hermit Warbler Setophaga townsendi/occidentalis
- Setophaga sp. Setophaga sp.
- passerine sp. Passeriformes sp.
- whistling-duck sp. Dendrocygna sp.
- Cackling/Canada Goose Branta hutchinsii/canadensis
- dabbling duck sp. Anatidae sp. (dabbling duck sp.)
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiDetails:
- Rock/Band-tailed Pigeon Columba livia/Patagioenas fasciata
- Selasphorus sp. Selasphorus sp.Details:
- hummingbird sp. Trochilidae sp.
- curlew sp. Numenius sp.Details:
- Scripps's/Craveri's Murrelet Synthliboramphus scrippsi/craveriDetails:
- gull sp. Larinae sp.
- Sooty/Bridled Tern Onychoprion fuscatus/anaethetus
- Elegant/Royal Tern Thalasseus elegans/maximus
- loon sp. Gavia sp.Details:
- black-and-white shearwater sp. Puffinus sp. (black-and-white shearwater sp.)
- sulid sp. Sulidae sp.Details:
- Boreal/Northern Saw-whet Owl Aegolius funereus/acadicusDetails:
- owl sp. Strigiformes sp.Details:
- sapsucker sp. Sphyrapicus sp.
- Melanerpes sp. Melanerpes sp.Details:
- Nuttall's/Ladder-backed Woodpecker Dryobates nuttallii/scalarisDetails:
- Northern/Gilded Flicker Colaptes auratus/chrysoides
- small falcon sp. Falco sp. (small falcon sp.)Details:
- Red-crowned/Lilac-crowned Parrot Amazona viridigenalis/finschi
- Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenysDetails:
- Myiarchus sp. Myiarchus sp.
- Cassin's/Western Kingbird Tyrannus vociferans/verticalis
- Cassin's/Plumbeous Vireo Vireo cassinii/plumbeus
- solitary vireo sp. Vireo cassinii/solitarius/plumbeus
- Black-capped/Mountain Chickadee Poecile atricapillus/gambeli
- Toxostoma sp. Toxostoma sp.
- rosy-finch sp. Leucosticte sp.Details:
- House/Purple Finch Haemorhous mexicanus/purpureus
- Dark-eyed/Yellow-eyed Junco Junco hyemalis/phaeonotus
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacuta
- Canyon/Abert's Towhee Melozone fusca/aberti
- Spotted/Eastern Towhee (Rufous-sided Towhee) Pipilo maculatus/erythrophthalmusDetails:
- towhee sp. Melozone/Pipilo sp.Details:
- new world sparrow sp. Passerellidae sp.
- Western/Eastern Meadowlark Sturnella neglecta/magna
- blackbird sp. Icteridae sp.
- Northern/Tropical Parula Setophaga americana/pitiayumi
- Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalusDetails:
- Anser sp. Anser sp.Details:
- Trumpeter/Tundra Swan Cygnus buccinator/columbianus
- swan sp. Cygnus sp.
- Blue-winged/Cinnamon Teal Spatula discors/cyanoptera
- Eurasian/American Wigeon Mareca penelope/americana
- Mallard/Mexican Duck Anas platyrhynchos/diazi
- Mallard/American Black Duck Anas platyrhynchos/rubripes
- Mexican/Mottled Duck Anas diazi/fulvigula
- American Black/Mottled Duck Anas rubripes/fulvigula
- Greater/Lesser Scaup Aythya marila/affinis
- Aythya sp. Aythya sp.Details:
- White-winged/Stejneger's Scoter Melanitta deglandi/stejnegeriDetails:
- Common/Barrow's Goldeneye Bucephala clangula/islandica
- new world quail sp. Odontophoridae sp.
- ptarmigan sp. Lagopus sp.Details:
- Ruffed/Spruce Grouse Bonasa umbellus/Canachites canadensis
- grouse sp. Tetraoninae sp.
- American/Greater Flamingo Phoenicopterus ruber/roseusDetails:
- Horned/Eared Grebe Podiceps auritus/nigricollis
- Streptopelia sp. Streptopelia sp.
- ground dove/Inca Dove Columbina sp.
- pigeon/dove sp. Columbidae sp.Details:
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmus
- cuckoo sp. (Cuculidae sp.) Cuculidae sp.Details:
- nighthawk sp. Chordeiles sp.Details:
- Antrostomus sp. Antrostomus sp.Details:
- Chimney/Vaux's Swift Chaetura pelagica/vauxi
- swift sp. Apodidae sp.
- Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandri
- Anna's/Costa's Hummingbird Calypte anna/costae
- Rufous/Allen's Hummingbird Selasphorus rufus/sasinDetails:
- King/Clapper Rail Rallus elegans/crepitans
- rail/crake sp. Rallidae sp. (rail/crake sp.)Details:
- golden-plover sp. Pluvialis dominica/apricaria/fulvaDetails:
- Black-bellied Plover/golden-plover sp. Pluvialis sp.Details:
- small plover sp. Charadrius/Anarhynchus sp.
- plover sp. Charadriidae sp.Details:
- Hudsonian/Marbled Godwit Limosa haemastica/fedoaDetails:
- Common/Wilson's Snipe Gallinago gallinago/delicata
- Gray-tailed/Wandering Tattler Tringa brevipes/incana
- Calidris sp. Calidris sp.
- large shorebird sp. Scolopacidae sp. (large shorebird sp.)Details:
- shorebird sp. Charadriiformes sp.Details:
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusDetails:
- Scripps's/Guadalupe/Craveri's Murrelet Synthliboramphus scrippsi/hypoleucus/craveriDetails:
- Western/Glaucous-winged Gull Larus occidentalis/glaucescens
- gull/tern sp. Laridae sp.
- tropicbird sp. Phaethon sp.
- Arctic/Pacific Loon Gavia arctica/pacificaDetails:
- Common/Yellow-billed Loon Gavia immer/adamsii
- storm-petrel sp. Oceanitidae/Hydrobatidae sp.Details:
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravis
- procellariid sp. Procellariidae sp.Details:
- Ardea sp. Ardea sp.Details:
- heron sp. Ardeidae sp.
- new world vulture sp. Cathartidae sp.
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiDetails:
- Accipiter sp. Accipiter sp.
- Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalus
- Red-shouldered/Broad-winged Hawk Buteo lineatus/platypterusDetails:
- Buteo sp. Buteo sp.
- Buteo/eagle sp. Buteo/eagle sp.
- hawk sp. Accipitridae sp. (hawk sp.)Details:
- eagle sp. Accipitridae sp. (eagle sp.)
- Spotted/Barred Owl Strix occidentalis/variaDetails:
- Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalis
- Red-naped/Red-breasted Sapsucker Sphyrapicus nuchalis/ruber
- Golden-fronted/Red-bellied Woodpecker Melanerpes aurifrons/carolinus
- American Three-toed/Black-backed Woodpecker Picoides dorsalis/arcticusDetails:
- Downy/Ladder-backed Woodpecker Dryobates pubescens/scalaris
- Downy/Hairy Woodpecker Dryobates pubescens/villosus
- Dryobates sp. Dryobates sp.Details:
- woodpecker sp. Picidae sp.Details:
- large falcon sp. Falco sp. (large falcon sp.)
- falcon sp. Falco sp.
- diurnal raptor sp. Accipitriformes/Falconiformes sp.
- Psittacara sp. Psittacara sp.Details:
- parrot sp. Psittaciformes sp. (parrot sp.)Details:
- Western/Eastern Wood-Pewee Contopus sordidulus/virensDetails:
- pewee sp. (Contopus sp.) Contopus sp.
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiDetails:
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriDetails:
- Gray/Dusky Flycatcher Empidonax wrightii/oberholseri
- phoebe sp. Sayornis sp.
- Tropical/Couch's Kingbird Tyrannus melancholicus/couchii
- yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)
- new world flycatcher sp. Tyrannidae sp.
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvus
- Philadelphia/Red-eyed Vireo Vireo philadelphicus/olivaceus
- vireo sp. Vireo sp.
- California/Woodhouse's Scrub-Jay Aphelocoma californica/woodhouseii
- jay sp. Corvidae sp. (jay sp.)Details:
- raven sp. Corvus sp. (raven sp.)
- crow/raven sp. Corvus sp.
- corvid sp. Corvidae sp.Details:
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillus
- Oak/Juniper Titmouse (Plain Titmouse) Baeolophus inornatus/ridgwayi
- Tufted/Black-crested Titmouse Baeolophus bicolor/atricristatus
- Tree/Violet-green Swallow Tachycineta bicolor/thalassina
- Tachycineta sp. Tachycineta sp.
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapa
- nuthatch sp. Sitta sp.Details:
- gnatcatcher sp. Polioptila sp.
- Sedge/Marsh Wren Cistothorus stellaris/palustrisDetails:
- wren sp. Troglodytidae sp.Details:
- Brown/Long-billed Thrasher Toxostoma rufum/longirostre
- Curve-billed/Bendire's Thrasher Toxostoma curvirostre/bendirei
- mimid sp. Mimidae sp.Details:
- bluebird sp. Sialia sp.
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliDetails:
- Catharus sp. Catharus sp.
- Varied Thrush/American Robin Ixoreus naevius/Turdus migratorius
- thrush sp. Turdidae sp.
- Bohemian/Cedar Waxwing Bombycilla garrulus/cedrorum
- Lonchura sp. Lonchura sp.Details:
- House/Eurasian Tree Sparrow Passer domesticus/montanus
- hawaiian honeycreeper sp. Drepanidinae sp.
- Purple/Cassin's Finch Haemorhous purpureus/cassiniiDetails:
- Common/Hoary Redpoll Acanthis flammea/hornemanni
- redpoll sp. Acanthis sp.
- crossbill sp. Loxia sp.Details:
- new world goldfinch sp. Spinus sp. (goldfinch sp.)
- Spinus sp. Spinus sp.
- Acanthis/Spinus sp. Acanthis/Spinus sp.
- finch sp. Fringillidae sp.
- Spizella sp. Spizella sp.
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.
- Western/Chihuahuan Meadowlark Sturnella neglecta/lilianae
- Sturnella meadowlark sp. Sturnella sp.
- Orchard/Hooded Oriole Icterus spurius/cucullatusDetails:
- new world oriole sp. Icterus sp.
- Red-winged/Tricolored Blackbird Agelaius phoeniceus/tricolorDetails:
- Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalus
- grackle sp. Quiscalus sp.Details:
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensis
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanoptera
- Colima/Virginia's Warbler Leiothlypis crissalis/virginiaeDetails:
- Leiothlypis sp. Leiothlypis sp.Details:
- MacGillivray's/Mourning Warbler Geothlypis tolmiei/philadelphia
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striata
- Black-throated Gray/Townsend's Warbler Setophaga nigrescens/townsendi
- Black-throated Gray/Hermit Warbler Setophaga nigrescens/occidentalis
- new world warbler sp. Parulidae sp.
- sparrow/warbler sp. (trilling song) Passerellidae/Parulidae sp. (trilling song)Details:
- Summer/Scarlet Tanager Piranga rubra/olivaceaDetails:
- Northern Cardinal/Pyrrhuloxia Cardinalis cardinalis/sinuatus
- Lazuli/Indigo Bunting Passerina amoena/cyanea
- Passerina sp. Passerina sp.
- bird sp. Aves sp.
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)
- Mallard/Hawaiian Duck Anas platyrhynchos/wyvilliana
- ibis sp. Threskiornithidae sp. (ibis sp.)
- Bullock's/Baltimore Oriole Icterus bullockii/galbula