American Cliff Swallow, Yellowstone NP, WY, USA May 2018-3
American Cliff Swallow, Yellowstone NP, WY, USA May 2018-4
American Cliff Swallow, Yellowstone NP, WY, USA May 2018-2
American Cliff Swallow, Yellowstone NP, WY, USA May 2018-1
American Cliff Swallow, Yellowstone NP, WY, USA May 2018-5
