IUCN Conservation Status: Least Concern
Powerful and fast-flying, the Peregrine Falcon hunts medium-sized birds, dropping down on them from high above in a spectacular stoop. They were virtually eradicated from eastern North America by pesticide poisoning in the middle 20th century. After significant recovery efforts, Peregrine Falcons have made an incredible rebound and are now regularly seen in many large cities and coastal areas.
Alarm call a loud series of harsh "kak, kak, kak."
All About Birds blog, Not Just Sparrows and Pigeons: Cities Harbor 20 Percent of World’s Bird Species, April 29, 2014.