Peregrine Falcons appear throughout the area, but especially, it seems, in wide open spaces near waterfowl.  We have regularly found Peregrine Falcons in Sulfur Springs Valley in the winter, and in Marana.  The most reliable location, however, has been around Christopher Columbus Park and the Sweetwater Wetlands in western Tucson.  An adult Peregrine normally roosts anywhere on the high-voltage power towers along the Santa Cruz river from a mile north of Camino del Cerro to Grant Road.  The entire Santa Cruz corridor, it seems, is a great place to find any Arizona falcon. 

 

Peregrine Falcons seem to be expanding greatly in our area, and whereas we used to rely on trips outside Tucson to find them, now a trip from Marana to Tucson down Silverbell road and a trip west on Ironwood Hill road west from Silverbell road will almost always produce a perched peregrine falcon on road-side telephone poles [not to mention a possible Prairie Falcon and a couple dozen Kestrels].