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National Zoological Park
Illustrated Checklist
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Native and Naturalized (184)
Hybrids (1)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Timothy Guida on 12 Feb 2014
Additional Taxa (24)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Howard Youth on 5 Oct 2019
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Bruce Steger on 17 Apr 1971
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Nathan Parmeter on 5 Nov 2023