A real good sign that this creek is good-and-healthy! A second look at this photo showed the 'little' black gnats; food!
Best viewed in 'original' size.
Nikon D800
,AF-S VR Nikkor 70-200mm f2.8G with TC-20 E II 1/160s f/5.6 at 400.0mm iso1000
FX Image Cropped 4x6" Landscape with Reduced pixels for Internet Viewing
full exif