Photo ID Challenge: Day Two

What am I?

Photo by John Perry

Hints:
1. Photo was taken in the later part of November at Avimor.
2. Avimor is a foothills location north of Boise, ID at about 3200 feet above sea level.
3. The habitat is willow and cottonwood dominated riparian draws adjacent to rolling hills of sage and prairie grass - shrub steppe.

More of the photo will be revealed in a couple of days.
Only one guess per person per post.
I will send the winner my copy of the book "Birding for Everyone".
The winner will be revealed on the day the full photo is revealed.