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Mercer
Illustrated Checklist
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Native and Naturalized (300)
Exotic: Escapee (11)
Hybrids (10)
- Barnacle x Cackling Goose (hybrid) Branta leucopsis x hutchinsiiLast observed by JamEs ParRis on 20 Nov 2018
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Joe Moore on 23 Oct 2022
- Domestic goose sp. x Canada Goose (hybrid) Anser sp. (Domestic type) x Branta canadensisLast observed by Katherine Tharrington on 8 Feb 2023
- Snow x Canada Goose (hybrid) Anser caerulescens x Branta canadensisLast observed by Anonymous eBirder on 26 Dec 2023
- Barnacle x Canada Goose (hybrid) Branta leucopsis x canadensisLast observed by Ken Walsh on 4 Dec 2023
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Alex Pillapakkam on 31 Mar 2024
- Carolina x Black-capped Chickadee (hybrid) Poecile carolinensis x atricapillusLast observed by Sharyn Magee on 24 Apr 2024
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Sam Vasen on 7 May 2021
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by William Anderson on 20 May 2017
Additional Taxa (73)
- Domestic goose sp. (Domestic type) Anser sp. (Domestic type)Last observed by Old Sam Peabody on 25 Feb 2024
- Mallard/American Black Duck Anas platyrhynchos/rubripesLast observed by Anonymous eBirder on 2 Feb 2024
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Vicki Schwartz on 29 Jul 2021
- large rail sp. Rallus sp. (large Rallus sp.)Last observed by Chris Brown NFC Station on 29 Apr 2020
- Great/Double-crested Cormorant Phalacrocorax carbo/Nannopterum auritumLast observed by David Dorini on 22 Jan 2023
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Anonymous eBirder on 7 Apr 2024
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Tong Mu on 14 Sep 2023
- Carolina/Black-capped Chickadee Poecile carolinensis/atricapillusLast observed by Alex Wiebe on 23 Apr 2024
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Sharyn Magee on 27 Sep 2021
- White-crowned/White-throated Sparrow Zonotrichia leucophrys/albicollisLast observed by Sarah G on 19 Feb 2022
- Nelson's/Saltmarsh Sparrow (Sharp-tailed Sparrow) Ammospiza nelsoni/caudacutaLast observed by Joe Melton on 20 Nov 2017
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Dennis Edgar on 11 May 2020
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanopteraLast observed by Alex Wiebe on 10 May 2021
- Bay-breasted/Blackpoll Warbler Setophaga castanea/striataLast observed by Maria Smith on 28 Aug 2020