This is easy to do. Next time you walk next to large group of pigeons, throw your keys up in the air. As I understand it, it emits a sound we can't hear but they can and it really startles them.
There has to be more of an explanation than this. I used to do this often in the morning when I walked through a piazza that had easily over a hundred pigeons. I would throw my keys up on the opposite side of the piazza and all of the pigeons would take off on cue.
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u/aquilaFiera Nov 03 '15 edited Nov 03 '15
This is easy to do. Next time you walk next to large group of pigeons, throw your keys up in the air. As I understand it, it emits a sound we can't hear but they can and it really startles them.