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Monhegan Island
Illustrated Checklist
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Native and Naturalized (316)
Exotic: Escapee (1)
Hybrids (5)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Miklos Oyler on 30 May 2023
- Herring x Great Black-backed Gull (hybrid) Larus argentatus x marinusLast observed by Doug Hitchcox on 4 Nov 2022
- Dark-eyed Junco x White-throated Sparrow (hybrid) Junco hyemalis x Zonotrichia albicollisLast observed by Thomas Magarian on 22 Apr 2011
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Jeremiah Trimble on 22 May 2023
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Marie Jordan on 21 May 2018
Additional Taxa (77)
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Patrick Maurice on 20 Sep 2023
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Jeremiah Trimble on 9 Oct 2021
- Ring-necked/Green Pheasant Phasianus colchicus/versicolorLast observed by Sandy & Bob Sipe on 21 Sep 2022
- Ruby-throated/Black-chinned Hummingbird Archilochus colubris/alexandriLast observed by Christopher Hinkle on 30 May 2022
- Red/Red-necked Phalarope Phalaropus fulicarius/lobatusLast observed by Jeremiah Trimble on 4 Oct 2003
- large shorebird sp. Scolopacidae sp. (large shorebird sp.)Last observed by Jeremiah Trimble on 19 May 2022
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusLast observed by Jeremiah Trimble on 29 Sep 2005
- storm-petrel sp. (white-rumped) Oceanitidae/Hydrobatidae sp. (white-rumped)Last observed by Luke Seitz on 21 Sep 2007
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisLast observed by Luke Seitz on 15 Aug 2022
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Peter Vickery on 29 Sep 1985
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by John Lorenc on 8 Oct 2023
- yellow-bellied kingbird sp. Tyrannus sp. (yellow-bellied)Last observed by Doug Hitchcox on 7 Oct 2014
- Cassin's/Blue-headed Vireo Vireo cassinii/solitariusLast observed by Jeremiah Trimble on 10 Oct 2014
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvusLast observed by Holly Merker on 13 Sep 2016
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Jeremiah Trimble on 11 Oct 2023
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacutaLast observed by tom aversa on 8 Oct 2021
- Shiny/Brown-headed Cowbird Molothrus bonariensis/aterLast observed by Thomas Magarian on 19 Nov 2010
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanopteraLast observed by Luke Seitz on 23 May 2018
- MacGillivray's/Mourning Warbler Geothlypis tolmiei/philadelphiaLast observed by Bill Thompson on 19 Sep 2023
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Desiree Narango on 1 Oct 2023