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Great Swamp NWR
Illustrated Checklist
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Native and Naturalized (245)
Exotic: Escapee (3)
Hybrids (4)
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Jim Mulvey on 4 Jan 2017
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Jeff Ellerbusch on 17 Dec 2022
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Joanne Laskowski on 22 May 1979
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Simon Lane on 9 May 2013
Additional Taxa (44)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Rob Fanning on 2 Jan 2019
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Jeff Ellerbusch on 16 Dec 2023
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Simon Lane on 29 Aug 2014
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Forrest Flesher on 30 Mar 2024
- Downy/Hairy Woodpecker Dryobates pubescens/villosusLast observed by richard greendyk on 30 Nov 2019
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Daniel Brill on 20 Aug 2021
- chickadee sp. Poecile sp.Last observed by R. Dale Twining (1921-2014) Birding Records Project Data on 28 Apr 1979
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Michael Britt on 18 May 2014
- Lincoln's/Swamp Sparrow Melospiza lincolnii/georgianaLast observed by Jeff Ellerbusch on 19 Oct 2017