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19 year old bird fanatic and amateur photog. Currently a NOAH Ranger and enjoying every minute I spend on the site.
Georgia, USASign In to follow
I can't clearly make out much from this picture alone, but I believe I see transparent "windows" in the primaries, indicating Red-shouldered. No dark patagial markings or belly band that I can see should eliminate Red-tailed.
It is a pure Mallard, but it has a number of different breeds in it, including Swedish and Call. Call Ducks are a "miniature" version of standard breeds and typically have shorter heads and bills and more rounded bodies. I would call this an adult drake.
Antshrike, either Planalto Slaty or Variable. Planalto Slaty seem to show more extensive white on the flights. I would tentatively say Variable based on that, but another shot showing the back more clearly would help, if available.