White-tailed Ptarmigan / Lagopus Leucurus
If you interested to see how I took those shots check my youtube video from that day: https://www.youtube.com/watch?v=fkJlBmdbMPE
Beautiful shot of this ptarmigan. I got a quick glimpse of a flapped wing of a WTP in Colorado--when I got nearer to where I had seen it, no bird, but a white feather left for me.
Nice capture of the movement!
Lovely work .