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Illustrated Checklist
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Native and Naturalized (342)
Exotic: Provisional (1)
Exotic: Escapee (7)
Hybrids (8)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Corey Wagner on 1 Apr 2024
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Joye Zhou on 8 Apr 2024
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosLast observed by Kyle Wiktor on 26 Dec 2020
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Amy Kearns on 22 Feb 2024
- Kelp x Herring Gull (hybrid) Larus dominicanus x argentatusLast observed by Ryan Sanderson on 24 Nov 2017
- Herring x Great Black-backed Gull (hybrid) Larus argentatus x marinusLast observed by Robert Guth on 13 Jan 2018
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Jack Swelstad on 12 May 2018
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Brad Bumgardner on 2 May 2011
Additional Taxa (86)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Larry Gray on 15 Jul 2023
- Trumpeter/Tundra Swan Cygnus buccinator/columbianusLast observed by Anonymous eBirber on 21 Feb 2024
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Frederick Ruckersfeldt on 8 Feb 2020
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by David Rupp on 25 Sep 2023
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by jeff mccoy on 20 May 2021
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Steve Biasetti on 13 Aug 2023
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusLast observed by brendan grube on 4 Sep 2022
- Double-crested/Neotropic Cormorant Nannopterum auritum/brasilianumLast observed by Sam Hartzler on 2 Sep 2016
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Austin Broadwater on 14 Apr 2024
- Golden/Bald Eagle Aquila chrysaetos/Haliaeetus leucocephalusLast observed by Kyle Wiktor on 7 Nov 2020
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Julie Gidwitz on 29 Sep 2023
- Philadelphia/Red-eyed Vireo Vireo philadelphicus/olivaceusLast observed by Jacob Socolar on 28 Aug 2021
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Emily Kate on 13 Apr 2023
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.Last observed by Sean Fitzgerald on 9 Oct 2010
- Grasshopper/Henslow's Sparrow Ammodramus savannarum/Centronyx henslowiiLast observed by Robert Guth on 3 Oct 2018
- Rusty/Brewer's Blackbird Euphagus carolinus/cyanocephalusLast observed by Kyle Wiktor on 31 Mar 2023
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Edwin Wilke on 18 May 2023
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanopteraLast observed by Matthew Young on 13 May 2023
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Julie Gidwitz on 3 Oct 2023