I must admit that I don't always go looking for them. There is a local building that used to have bug problems with Starlings and other birds making a mess of things. It was so bad, that the area was considered a bio-hazard. So, in conjunction with am area project to reintroduce Peregrins to the area, the pest birds were taken care in a way :D Here's the link top the web page
Woodmen of the World Peregrine FalconWatch