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Holden Arboretum--Garden and Collections
Illustrated Checklist
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Native and Naturalized (240)
Exotic: Escapee (1)
Hybrids (1)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Dan Donaldson on 26 Dec 2021
Additional Taxa (33)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Cole DiFabio on 29 May 2015
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by DEBORAH SCHUSTER on 26 May 2014
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Louise Acheson on 4 Jul 2023
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Stan Plante on 15 Nov 2015
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Andrew Baxter on 14 Sep 2019