?Juvenile Sparrows Yellowstone/Grand Tetons in July (1 Viewer)

Whilst in Yellowstone and the Tetons last month I came across some incredibly confiding birds at 3 separate sites. In each case it was hard to get far enough away from the birds to photograph them! I could not identify any of these. I questioned the rangers at Jenny Lake and they suggested juv White-crowned Sparrow for the individual shown from there but it is not clear if all 3 are the same species. I hope someone can shed some light on these!

Vernon

1. On my balcony at Signal Mountain Lodge, Grand Tetons - Photos 1-3
2. At the Jenny Lake visitor centre feeding with cowbirds - Photo 4
3. Feeding at my feet on a boardwalk at Old Faithful - Photo montage 5

Perhaps there is something I am not thinking of, but these all look like juvenile Brown-headed Cowbirds to me.

Agree. All are juvenile Brown-headed Cowbirds.

Agree cowbirds