I, too, grew up in a large urban area (Chicago) with all its large
buildings, and have noticed three very significant architectural changes for
peregrines: buildings are very much higher; the almost exclusive use of
thermally-efficient but highly reflective glass in windows of all newer
buildings, and the larger percentage of buildings' sides the windows occupy.

Sum them up and our architects have created beautiful buildings but a huge
hall of mirrors in every American city, and, as in the James Bond movie
(can't remember which one), the price of a navigational or wind shear
error is death or serious injury for fast-flying peregrines. Speed does
truly kill in this case, by denying them time to correct for the illusion
of sky skyscraper windows produce. Make sense?