Here is a Ring-necked Duck that I photographed while my wife and I walked our dog in Golden Gate Park this past weekend.
I must confess I don’t do much - if any - flat light shooting as I usually save those days for biking and birding. So, I hope this works.
Probably could have dropped a stop of ISO for a bit more detail, but there it is.
Canon 100-400mm f/4.5-5.6 IS II on EOS 7D Mark II
1/1600 at f/5.6, ISO 1600, handheld
Processed in Lightroom. Cloned out a half dozen spots on water’s surface
Cheers
Dorian