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East Rock Park
Illustrated Checklist
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Native and Naturalized (210)
Exotic: Escapee (2)
Hybrids (3)
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Cody Limber on 9 Feb 2024
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Raymond Belding on 17 May 1997
- Lawrence's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F2 backcross)Last observed by Andrew MacDonald on 8 May 2023
Additional Taxa (41)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by Tom Murray on 14 May 2022
- Yellow-crowned/Black-crowned Night Heron Nycticorax nycticorax/Nyctanassa violaceaLast observed by Severin Uebbing on 1 May 2022
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by William Batsford on 23 Sep 2020
- Ruby-crowned/Golden-crowned Kinglet Corthylio calendula/Regulus satrapaLast observed by Cody Limber on 21 Nov 2021
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Severin Uebbing on 22 May 2022
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by Forrest Wickman on 18 Apr 2021