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Brandywine Creek State Park
Illustrated Checklist
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Native and Naturalized (208)
Hybrids (5)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Kelley Nunn on 10 May 2016
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by dean Coffin on 27 Feb 2016
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Andrew Dunn on 27 May 2023
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Kelley Nunn on 10 May 2016
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Andrew Ednie on 2 Sep 2018
Additional Taxa (27)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Karen Batt on 7 May 2021
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Melissa Lafferty on 23 Apr 2021
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Andrew Ednie on 25 Sep 2022
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Andrew Ednie on 26 Aug 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by Chad Wood on 22 Apr 2022
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Scott Northey on 4 Oct 2020