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Butler
Illustrated Checklist
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Native and Naturalized (292)
Exotic: Escapee (7)
Hybrids (5)
- Greater White-fronted x Canada Goose (hybrid) Anser albifrons x Branta canadensisLast observed by Martin Carlin on 29 Apr 2024
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Corey Bellis on 2 Apr 2022
- Gadwall x Mallard (hybrid) Mareca strepera x Anas platyrhynchosLast observed by Martin Carlin on 2 Dec 2018
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Corey Bellis on 23 Feb 2020
- Carolina x Black-capped Chickadee (hybrid) Poecile carolinensis x atricapillusLast observed by Linda Croskey on 7 May 2021
Additional Taxa (47)
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Mary Alice Koeneke on 16 May 2024
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Phillip Rogers on 29 Oct 2022
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Oscar Miller on 1 Jul 2024
- Philadelphia/Red-eyed Vireo Vireo philadelphicus/olivaceusLast observed by Martin Carlin on 7 Oct 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by Andy Lariviere on 24 Apr 2024
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Claire Kluskens on 7 Apr 2012
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Glenn Koppel on 16 Sep 2023