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Washington
Illustrated Checklist
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Native and Naturalized (255)
Exotic: Escapee (4)
Hybrids (4)
- Swan Goose x Canada Goose (hybrid) Anser cygnoides x Branta canadensisLast observed by Terry Bronson on 17 Feb 2022
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Terry Bronson on 3 Aug 2021
- Muscovy Duck x Mallard (hybrid) Cairina moschata x Anas platyrhynchosLast observed by Heather Aubke on 2 Jul 2021
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Terry Bronson on 6 Mar 2022
Additional Taxa (44)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Terry Bronson on 19 Jan 2023
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Terry Bronson on 10 May 2020
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Terry Bronson on 29 Sep 2021
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Heather Ellison on 11 May 2020
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Terry Bronson on 8 May 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by Alicia McIntire on 19 Jan 2024
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Terry Bronson on 26 Nov 2022
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Terry Bronson on 26 Sep 2023