Birdbanking

Thousands of dollars are lost in a big city every day, dropped onto pavement to be washed away or swept into street sweepers. There has been no economic way to collect most of them until now.

This business would train crows and pigeons to insert coins into a slot. The slot would function as a vending machine, outputting a quantity of bird food for every coin. Soon birds would be searching the city for any unprotected coin and bringing it in for food. There is absolutely no risk of birds learning to steal money and any accusation of such would be libelous.

A more mundane and less profitable version would output bird food for trash collected and dropped into a dumpster.