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Wellfleet Bay Wildlife Sanctuary (Mass Audubon)
Illustrated Checklist
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Native and Naturalized (311)
Exotic: Escapee (3)
Hybrids (4)
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Mary Lou Heintz on 11 May 2017
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Peter Grose on 12 Jan 2024
- Spotted x Eastern Towhee (hybrid) Pipilo maculatus x erythrophthalmusLast observed by Marshall Iliff on 14 Apr 2018
- Golden-winged x Blue-winged Warbler (hybrid) Vermivora chrysoptera x cyanopteraLast observed by WBWS Banding Team on 1 Sep 2023
Additional Taxa (64)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Hailey Cambra on 7 May 2021
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Jonathan Minker on 25 Feb 2024
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Jeremy Cushman on 9 Sep 2020
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by August Mirabella on 1 Jul 1971
- Black-bellied Plover/golden-plover sp. Pluvialis sp.Last observed by Claire Borrelli on 14 Aug 2023
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Alison DeMartino on 11 Sep 2022
- Western/Semipalmated Sandpiper Calidris mauri/pusillaLast observed by Mary Lou Heintz on 6 Nov 2021
- large shorebird sp. Scolopacidae sp. (large shorebird sp.)Last observed by Alan Bragg on 7 Sep 2009
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusLast observed by Paul Jay on 27 Aug 2017
- white-winged gull sp. Larus sp. (white-winged gull sp.)Last observed by Krzysztof Kurylowicz on 5 Feb 2019
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisLast observed by Suzanne Johannet on 28 Jul 2022
- black-and-white shearwater sp. Puffinus sp. (black-and-white shearwater sp.)Last observed by John Pratt on 1 Aug 2017
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Adam Manninen on 20 Oct 2023
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Kyle Jones on 5 Dec 1992
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvusLast observed by Mary Lou Heintz on 8 Sep 2022
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Ryan Johnson on 16 Apr 2021
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Mary Lou Heintz on 29 Sep 2018
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacutaLast observed by Sze On Ng (Aaron) on 4 Nov 2023
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Mark Faherty on 16 Apr 2024