Curve-billed thrasher Ron Niebrugge March 11, 2020 Arizona, Photos, Travel, Tucson Leave a Comment Curve-billed thrasher, Desert Photo Retreat, near Tucson, Arizona. A Curve-billed thrasher from Monday night at the Desert Photo Retreat. One of the complaints I hear from bird photographers regarding 4/3 systems like my Olympus is that you can’t get those silky smooth out of focus backgrounds. I say non-sense!