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Penobscot
Illustrated Checklist
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Native and Naturalized (288)
Exotic: Provisional (1)
Exotic: Escapee (4)
Hybrids (4)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Nathaniel Austin on 7 May 2024
- Mallard x Northern Pintail (hybrid) Anas platyrhynchos x acutaLast observed by Ross Knowlton on 26 Mar 2024
- Common x Barrow's Goldeneye (hybrid) Bucephala clangula x islandicaLast observed by Louis Bevier on 15 Dec 2016
- Herring x Glaucous Gull (hybrid) Larus argentatus x hyperboreusLast observed by Peter Vickery on 9 Jan 1977
Additional Taxa (59)
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Myles Quirion on 26 Apr 2024
- Ruffed/Spruce Grouse Bonasa umbellus/Canachites canadensisLast observed by Douglas Richard on 9 Oct 2021
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by tom aversa on 11 Aug 2022
- Lesser/Greater Yellowlegs Tringa flavipes/melanoleucaLast observed by Catherine Schmitt on 7 May 2024
- white-winged gull sp. Larus sp. (white-winged gull sp.)Last observed by Robert Ostrowski on 29 Nov 2018
- Great/Double-crested Cormorant Phalacrocorax carbo/Nannopterum auritumLast observed by Robert Ostrowski on 11 Apr 2015
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Charlie Todd on 14 Aug 2016
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Myles Quirion on 17 Apr 2024
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Kurt Ongman on 1 Sep 2023
- Philadelphia/Warbling Vireo Vireo philadelphicus/gilvusLast observed by Deanna Prince on 9 Sep 2020
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Braden Collard on 28 Aug 2022