Quoting KFC Kickin For Christ,
Why didn't you ask him? Might have made for an interesting conversation
Maybe it was for his dinner? People are hurting right now. I'm thinking maybe those cute little ducks we see in little bodies of water all over the place aren't safe anymore? Survival of the fittest?
I think we're starting to see alot of very weird sights lately.
The world has gotten stranger and stranger and I see no end in sight.
As mentioned, he was walking across an empty lot, a decent distance away and I had no intention of chacing him down to ask about a dead duck. 
I have no problem with it being for dinner, but my question was, and is, where did he get it? No pond or lake around there within a reasonable walking distance.
Road kill perhaps?