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Rocky Mountain Biological Laboratory
Illustrated Checklist
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Native and Naturalized (125)
Additional Taxa (19)
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Louis Bliard on 31 May 2022
- Hammond's/Dusky Flycatcher Empidonax hammondii/oberholseriLast observed by Scott Fraser on 17 Jun 2023
- Black-capped/Mountain Chickadee Poecile atricapillus/gambeliLast observed by Caitlin Wells Salerno on 21 Jul 2021