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Pennypack Ecological Restoration Trust
Illustrated Checklist
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Native and Naturalized (221)
Exotic: Escapee (1)
Hybrids (2)
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Mike Grubb on 12 Sep 2019
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Mike Grubb on 20 Sep 2022
Additional Taxa (49)
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Frances Brown on 12 Feb 2020
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Maria K on 16 May 2022
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by ileen roos on 12 Nov 2023
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by danielle Viands on 1 May 2021
- Spizella sp./American Tree Sparrow Spizella/Spizelloides sp.Last observed by Glenn Seeholzer on 14 Nov 2020
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Matthew Danihel on 10 Aug 2022
- Connecticut/MacGillivray's/Mourning Warbler Oporornis/Geothlypis sp. (Mourning-type)Last observed by Paul Driver on 4 Oct 2021
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Lynn Jackson on 7 Sep 2021