Eagles abound in Yellowstone.. Unfortunately, it's a big place and they are always on the other side of an impassable river or in the heights of trees on unclimbable mountains..
Here are a couple that are just on the edge of capability/equipment for this old Landscape Photographer and his ancient box camera...
They are, of course, on the other side of an impassable river, high up at the tree-line. More Landscape than Bird Photos.
(I'm almost embarrassed to post them on credible photo Forums, but it is still impressive seeing them in the wild)