I struggle with these ducks. I am going with the Greater because of the shape of the head, the green iridescence, and that is sits low in the water. If I am wrong please comment. Image captured at Lake Mirror, Lakeland, Florida. Comments and critique welcomed and appreciated. Thank you for viewing.
Nikon D7000
Nikon 80-400mm F/4.5-5.6 VRII AF-S ED shot at 400mm (600mm FFE)
1/1600 F/5.6 Matrix Metering - 1 EV ISO 160
Post processed in Lightroom 5 and Photoshop Elements 10
Cropped for composition
Joe Przybyla
"Sometimes I do get to places just as God is ready to have somebody click the shutter"... Ansel Adams
I like the fact we can see its foot under the water. Neat "low swimming" pose. Cool green and purple sheen on the head. The duck is sitting quite high in the frame for my tastes. These two species can be very difficult to tell apart.