Just a guess but possibly someone's dog killed them and the owner put the birds in the cans. I suggest reporting it to the Franklin county wildlife officer. 
Christina Voise
Delaware County

Sent from my iPhone

On Dec 25, 2013, at 3:55 PM, Jay Frye <[log in to unmask]> wrote:

> I'm in Columbus for the day and took a walk around Antrim Park and found a
> couple of dead trumpeter swans in trash cans. It seemed quite puzzling. Who
> on earth would have wrangled these things into trash cans?   They were in
> consecutive cans in corner of the lake to the far left from the parking
> area.
> 
> Any ideas what happened?
> 
> Jay
> 
> 
> --
> Sent from Gmail Mobile
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