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Rock Creek Park
Illustrated Checklist
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Native and Naturalized (177)
Hybrids (1)
- Brewster's Warbler (hybrid) Vermivora chrysoptera x cyanoptera (F1 hybrid)Last observed by Bill Kunze on 11 May 1997
Additional Taxa (27)
- Alder/Willow Flycatcher (Traill's Flycatcher) Empidonax alnorum/trailliiLast observed by Stan Smith on 4 Sep 2021
- Louisiana/Northern Waterthrush Parkesia motacilla/noveboracensisLast observed by David Amini🦉 on 12 May 2021