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Yellowstone NP--Hayden Valley
Illustrated Checklist
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Native and Naturalized (180)
Hybrids (1)
- Common Goldeneye x Hooded Merganser (hybrid) Bucephala clangula x Lophodytes cucullatusLast observed by Christian Hagenlocher on 14 Jan 2020
Additional Taxa (31)
- Common/Barrow's Goldeneye Bucephala clangula/islandicaLast observed by Paulette Epple on 18 May 2021
- Short-billed/Long-billed Dowitcher Limnodromus griseus/scolopaceusLast observed by Will Weber on 16 Sep 2014
- Black-capped/Mountain Chickadee Poecile atricapillus/gambeliLast observed by Terry Virtue on 20 Jul 2021