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Observatory Mountain
Illustrated Checklist
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Native and Naturalized (145)
Hybrids (2)
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Drew Chaney on 4 May 2020
- Northern Parula x Yellow-throated Warbler (hybrid) Setophaga americana x dominicaLast observed by Timothy Hodge on 6 May 2021
Additional Taxa (25)
- Yellow-billed/Black-billed Cuckoo Coccyzus americanus/erythropthalmusLast observed by James Winkelmann on 5 May 2020
- Golden-winged/Blue-winged Warbler Vermivora chrysoptera/cyanopteraLast observed by Drew Chaney on 2 May 2022