Cinnamon teal, Anas cyanoptera
Sage thrasher, Oreoscoptes montanus
Yellow-headed blackbird, Xanthocephalus xanthocephalus
Audubon's warbler, Dendroica auduboni, recently elevated to species rank once again.
Common raven, Corvus corax
And the Mammals
Uinta ground squirrel, Urocitellus armatus
Bighorn sheep, Ovis canadensis
Grizzly Bear, Ursus arctos horribilis
American black bear, Ursus americanus
Coyote, Canis latrans
American badger, Taxidea taxus
And there you go, I hope you enjoyed my little adventure to Yellowstone as much as I did.