I went for a walk in the downtown last night. When I was on the west side of 18 block Broad St. around 8:15 p.m. I noticed a fair bit of commotion across the street at the pigeon condo a.k.a. the Travellers Building.
Pigeons were flying around and landing, then taking off and landing again, and making that weird warbly sound that they make. I took a closer look and ended up taking the above snap.
If you compare it to a shot of the building I took in April 2014, it does seem that the windows on the second floor that had been open previously are now closed so the pigeons are no longer able to roost there at night as I believe they were in the habit of doing.
Judging by the confusion I observed in the pigeon community, this is a relatively recent development. But I don’t have any other confirmation of that beyond the pigeons. Both photos can be enlarged by clicking on them to see the pigeons in better detail.