Recently I had the opportunity to style a few portraits for Chicago magazine and their annual Green Awards. Among the recipients was zoologist, Mary Hennen. Mary is a scientist at the Field Museum and is responsible for setting up a conservation program here in Chicago that helps to raise awareness and protect the city's rare Peregrine falcon population. Per's (as she calls them) have adapted to city life by making their home the ledges of the tall sky scrappers around Chicago. Unlike most other birds, they don't build nests, but make impressions in the stones found on the ledges.
If interested, you can track Peregrine nests in the city and see if there is "Per" in your neighborhood: