There was a news story about "immoral" scrap yards getting away with scrapping pre'82 pennies a while back I saw (before I was a full-time scrapper)
Well, anyway my earlier reply was getting too long, but I saw a very interesting story one time:
Somebody (from a college IIRC) did a project,
Where they actually trained crows (or Ravens, same family birds anyway)...
To pick up coins from the city street.
These Birds would then place them in basically a "bird vending machine"...
Then bird food of some sort came out.
AND this project actually worked!!!
These birds would collect loose coins off the street, fly up to the machine, drop them in, and food for them came out!
I thought it was very interesting.
No time to find a linky right now though, but I remember that one...very cool idea IMO.
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