The problem started when the new owner complained to Bill that he was losing significant amounts of money form his coin machines each week. He went as far as to accuse Bill's employees of having a key to the boxes and ripping him off. Bill just couldn't believe that his people would do that. So they setup a trap for the thief.
Starlings, the birds pictured here, are often attracted to bright, shiny objects and will collect them for nesting or mate-attraction purposes whenever the opportunity presents itself. Most likely one or more starlings was attracted by the glint of overlooked quarters in the change cup and made off with them; other starlings saw where the quarters were coming from and imitated the behavior, learning in the process how to work as teams to retrieve coins from inside the machine itself.
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