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River Bend Forest Preserve
Illustrated Checklist
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Native and Naturalized (228)
Hybrids (1)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Nicholas Sly on 5 Jan 2015
Additional Taxa (43)
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Alex Lowe-Massi on 17 Nov 2022
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Amanda Merck on 27 Dec 2021
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Christine W. on 24 May 2020
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Christine W. on 29 Apr 2024
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Emma Winnicki-Smith on 15 May 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by John Garrett on 11 Mar 2024
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Christine W. on 15 Apr 2022