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Illustrated Checklist
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Native and Naturalized (495)
Exotic: Provisional (10)
Exotic: Escapee (71)
Hybrids (36)
- Swan Goose x Canada Goose (hybrid) Anser cygnoides x Branta canadensisLast observed by George Nothhelfer on 8 Feb 2022
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensisLast observed by Terry Hill on 28 Apr 2017
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Kat Avila on 27 Sep 2019
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Anonymous eBirder on 17 Mar 2024
- Blue-winged x Cinnamon Teal (hybrid) Spatula discors x cyanopteraLast observed by Brian Daniels on 21 Mar 2024
- Blue-winged Teal x Northern Shoveler (hybrid) Spatula discors x clypeataLast observed by Brian Daniels on 17 Nov 2021
- Cinnamon Teal x Northern Shoveler (hybrid) Spatula cyanoptera x clypeataLast observed by Brian Daniels on 20 Mar 2024
- Northern Shoveler x Gadwall (hybrid) Spatula clypeata x Mareca streperaLast observed by Dorian Anderson on 21 Feb 2016
- Eurasian x American Wigeon (hybrid) Mareca penelope x americanaLast observed by Thomas Lopez on 24 Dec 2023
- Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchosLast observed by Brandon Reo on 5 Sep 2014
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosLast observed by Edana Salisbury on 3 Apr 2024
- Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acutaLast observed by Thomas Van Huss on 29 Nov 2019
- Blue-winged x Green-winged Teal (hybrid) Spatula discors x Anas creccaLast observed by Jeff Bray on 12 Jan 2014
- Western x Clark's Grebe (hybrid) Aechmophorus occidentalis x clarkiiLast observed by Cadeo Scott Schipper on 20 Jan 2024
- Anna's x Allen's Hummingbird (hybrid) Calypte anna x Selasphorus sasinLast observed by Kim Moore on 26 May 2022
- Anna's Hummingbird x Selasphorus sp. (hybrid) Calypte anna x Selasphorus sp.Last observed by Sylvia Afable on 28 Mar 2024
- American x Black Oystercatcher (hybrid) Haematopus palliatus x bachmaniLast observed by Pema Zonglo on 20 Jul 2022
- Herring x Glaucous Gull (hybrid) Larus argentatus x hyperboreusLast observed by Brian Daniels on 15 Dec 2012
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescensLast observed by Van Pierszalowski on 13 Mar 2024
- Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescensLast observed by Cin-Ty Lee on 28 Dec 2023
- Glaucous x Glaucous-winged Gull (hybrid) Larus hyperboreus x glaucescensLast observed by Curtis Marantz on 18 Feb 2012
- Sandwich x Elegant Tern (hybrid) Thalasseus sandvicensis x elegansLast observed by Roger Schoedl on 2 Apr 2022
- Double-crested x Neotropic Cormorant (hybrid) Nannopterum auritum x brasilianumLast observed by Doug Willick on 10 Jul 2020
- Little Blue Heron x Snowy Egret (hybrid) Egretta caerulea x thulaLast observed by Brian Daniels on 7 Oct 1990
- Glossy x White-faced Ibis (hybrid) Plegadis falcinellus x chihiLast observed by Roger Schoedl on 6 Jun 2015
- Yellow-bellied x Red-naped Sapsucker (hybrid) Sphyrapicus varius x nuchalisLast observed by James Maley on 30 Jan 2021
- Red-naped x Red-breasted Sapsucker (hybrid) Sphyrapicus nuchalis x ruberLast observed by Drew Hatcher on 10 Mar 2024
- Downy x Nuttall's Woodpecker (hybrid) Dryobates pubescens x nuttalliiLast observed by Peter Gordon on 26 Mar 2024
- Red-crowned x Lilac-crowned Parrot (hybrid) Amazona viridigenalis x finschiLast observed by Bentley Colwill on 4 May 2023
- Red-crowned x Red-lored Parrot (hybrid) Amazona viridigenalis x autumnalisLast observed by Noah Arthur on 16 Oct 2022
- White-crowned x White-throated Sparrow (hybrid) Zonotrichia leucophrys x albicollisLast observed by Brian Daniels on 11 Jan 2023
- Cape May x Yellow-rumped Warbler (hybrid) Setophaga tigrina x coronataLast observed by Chuck Schussman on 23 Apr 2018
- Magnolia x Yellow-rumped Warbler (hybrid) Setophaga magnolia x coronataLast observed by Brian Daniels on 16 Mar 2024
- Black-throated Gray x Townsend's Warbler (hybrid) Setophaga nigrescens x townsendiLast observed by Kelly Coles on 10 Jan 2023
- Townsend's x Hermit Warbler (hybrid) Setophaga townsendi x occidentalisLast observed by Thomas Wurster on 13 May 2023
- Rose-breasted x Black-headed Grosbeak (hybrid) Pheucticus ludovicianus x melanocephalusLast observed by Sam Cerny on 7 Jun 2017
Additional Taxa (183)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Elizabeth Rael on 19 Apr 2024
- Rock/Band-tailed Pigeon Columba livia/Patagioenas fasciataLast observed by Ryan Winkleman on 11 Sep 2020
- Eurasian/African Collared-Dove Streptopelia decaocto/roseogriseaLast observed by Anonymous eBirder on 30 Jul 2023
- Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandriLast observed by Thomas Wurster on 7 Sep 2021
- American/Black Oystercatcher Haematopus palliatus/bachmaniLast observed by Phil Swan on 19 Jan 2019
- American/Pacific Golden-Plover (Lesser Golden-Plover) Pluvialis dominica/fulvaLast observed by Marshall Iliff on 15 Nov 2003
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Becky Kitto on 21 Apr 2024
- Red/Red-necked Phalarope Phalaropus fulicarius/lobatusLast observed by Tino Castillo on 22 Oct 2023
- Western/Semipalmated Sandpiper Calidris mauri/pusillaLast observed by Francesca Zeta on 29 Sep 2012
- large shorebird sp. Scolopacidae sp. (large shorebird sp.)Last observed by Braxton Landsman on 14 Jul 2023
- Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticusLast observed by Tom Benson on 17 Sep 2023
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusLast observed by Avo Stilt on 30 Mar 2024
- Scripps's/Guadalupe Murrelet (Xantus's Murrelet) Synthliboramphus scrippsi/hypoleucusLast observed by Christopher Taylor on 28 Feb 2016
- Scripps's/Craveri's Murrelet Synthliboramphus scrippsi/craveriLast observed by Naresh Satyan on 9 Jul 2023
- Scripps's/Guadalupe/Craveri's Murrelet Synthliboramphus scrippsi/hypoleucus/craveriLast observed by Tom Benson on 13 Aug 2022
- Herring/Glaucous-winged Gull Larus argentatus/glaucescensLast observed by Braxton Landsman on 20 Nov 2023
- Western/Glaucous-winged Gull Larus occidentalis/glaucescensLast observed by Braxton Landsman on 22 Feb 2024
- white-winged gull sp. Larus sp. (white-winged gull sp.)Last observed by James Earles on 15 Mar 2024
- Leach's/Townsend's Storm-Petrel (dark-rumped) Hydrobates leucorhous/socorroensis (dark-rumped)Last observed by Tom Benson on 13 Aug 2022
- Leach's/Townsend's Storm-Petrel (white-rumped) Hydrobates leucorhous/socorroensis (white-rumped)Last observed by Tom Benson on 13 Aug 2022
- storm-petrel sp. (dark-rumped) Oceanitidae/Hydrobatidae sp. (dark-rumped)Last observed by Naresh Satyan on 27 Aug 2023
- storm-petrel sp. (white-rumped) Oceanitidae/Hydrobatidae sp. (white-rumped)Last observed by Tom Benson on 14 Jul 2018
- Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostrisLast observed by Jimmy McMorran on 1 Jan 2024
- Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianumLast observed by Braxton Landsman on 3 Nov 2023
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Tom Schulenberg on 8 Mar 2024
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Brian Daniels on 21 Apr 2024
- Yellow-bellied/Red-naped Sapsucker Sphyrapicus varius/nuchalisLast observed by Katie Ng on 8 Mar 2024
- Red-naped/Red-breasted Sapsucker Sphyrapicus nuchalis/ruberLast observed by Thomas Wurster on 4 Jan 2024
- White-winged/Yellow-chevroned Parakeet Brotogeris versicolurus/chiririLast observed by Trish Gussler on 29 Dec 2015
- Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenysLast observed by Sean Crockett on 29 Dec 2023
- large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.Last observed by Emilia Deino on 30 Mar 2024
- Western/Eastern Wood-Pewee Contopus sordidulus/virensLast observed by Thomas Wurster on 17 Jun 2023
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriLast observed by Nancy Salem on 21 May 2023
- Cassin's/Western Kingbird Tyrannus vociferans/verticalisLast observed by Melissa Petullo on 21 Apr 2024
- Cassin's/Blue-headed Vireo Vireo cassinii/solitariusLast observed by Anonymous eBirder on 21 Sep 2023
- solitary vireo sp. Vireo cassinii/solitarius/plumbeusLast observed by Sherry Meddick on 11 May 2022
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvusLast observed by Anonymous eBirder on 5 Oct 2022
- Arctic/Kamchatka Leaf Warbler Phylloscopus borealis/examinandusLast observed by Amin Khalifa on 20 Sep 2020
- Sagebrush/Bell's Sparrow (Sage Sparrow) Artemisiospiza nevadensis/belliLast observed by john fitch on 19 Dec 2000
- Red-winged/Tricolored Blackbird Agelaius phoeniceus/tricolorLast observed by Michael Moon on 26 Apr 2022
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Brian Daniels on 3 May 1992
- MacGillivray's/Mourning Warbler Geothlypis tolmiei/philadelphiaLast observed by Thomas Wurster on 11 Oct 2021
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Brian Daniels on 24 Sep 2006
- Townsend's/Hermit Warbler Setophaga townsendi/occidentalisLast observed by t. martello on 16 Feb 2024
- Rose-breasted/Black-headed Grosbeak Pheucticus ludovicianus/melanocephalusLast observed by Will Black on 9 Jan 2024