Found this warbler species in several locations around Steamboat Springs; this particular shot was taken during a hike above Fish Creek Falls.
This is a cropped version of the 'previous' image to show more details.
Nikon D800
,AF-S VR Nikkor 70-200mm f2.8G with TC-20 E II 1/400s f/8.0 at 600mm iso720
DX Image Cropped 5x7" Landscape with Size Reduced for Internet Viewing
full exif