It's for the birds...

We are still in Paris (about at the end of our trip). As we were walking across the square in front of Notre Dame de Paris, I realized that tons of people were standing in a sea of pigeons. Evidently it's a "thing" to call the pigeons to you (I mean to literally land all over you). It isn't something I would do, but it seemed to be attracting a wide group of people attempting it.