My best guess is Savannah, but I'm certainly not a sparrow expert! Watched this one take a mid-day bath in Mill Run today.
See previous image for pre-bath perching image over Mill Run (very same bird).
Best viewed in 'original' size.
Nikon D800
,AF-S Nikkor ED 500mm 1:4 D 1/160s f/4.0 at 750mm iso280
DX Image Cropped 5x7" Landscape and Reduced to 210 ppi for Internet Viewing
full exif
Nice sharp shot of it taking a bath Don. I've not seen one in the water. also, we usually only see them in the Spring when the Savannahs seem to have a bit more yellow on their face. Does look like a Savannah though.