Thanks to my pal Dorothy (Hi Dorothy! Dorothy doesn't Computer, but regardless--thanks!) who alerted me to the peregrine falcons nesting on top of 1130 South Michigan Ave. You can watch them here on cam--I just checked it to see how they survived the little 4:00 deluge and they are doing fine.
I am really charmed by the idea of these not particularly huge birds interfering with skyscraper window-washing because of their 200 mph plunges and fierce territoriality about their wobbly little chicks, who will soon emerge. They are really beautiful birds.