Identification based on where I spotted this individual - - along the hiking trail that parallels the Yampa River.
Best viewed in 'original' size.
Nikon D800
,AF-S VR Nikkor 70-200mm f2.8G with TC-20 E II 1/250s f/5.6 at 400.0mm iso200
DX Image Cropped 4x6" Landscape with Reduced pixels for Internet Viewing
full exif