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Illustrated Checklist
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Native and Naturalized (267)
Exotic: Escapee (3)
Hybrids (3)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by irina shulgina on 9 Mar 2014
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Robert Dudley on 31 Dec 2023
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Blake Mathys on 4 Sep 2014
Additional Taxa (45)
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by dal taylor on 14 May 2022
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Tiphanie Hoy on 20 Feb 2024
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Carl Winstead on 28 May 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by irina shulgina on 18 Feb 2012
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.Last observed by Susan Heino on 13 Feb 2021
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Anonymous eBirder on 16 May 2020
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Blake Mathys on 16 Sep 2021