Identification
The Peregrine is the ultimate avian athlete, roughly the size of a crow but with a far more muscular, "blocky" chest. In flight, look for long, pointed, sickle-shaped wings and a medium-length, slightly tapered tail. Adults sport a striking slate-blue back and a pale underside heavily barred with dark charcoal. The most diagnostic field mark is the "malar stripe"—a thick, dark wedge extending down from the eye like a heavy mustache or helmet. Distinguish it from the similar Prairie Falcon by its darker upperparts and the absence of black "armpits" (axillaries) during flight.
Habitat & Range
True to its name (*peregrinus* means "wanderer"), this is the most widespread raptor on Earth, found on every continent except Antarctica. They favor wide-open expanses: coastal cliffs, mountain ranges, and river valleys. Remarkably, they have become the kings of the "urban canyon," swapping limestone cliffs for skyscrapers and bridges, which provide high-altitude nesting sites and a steady supply of city birds.
Behaviour
Watching a Peregrine is a lesson in intensity. They spend hours perched motionless on high ledges, scanning the horizon with telescopic vision. During the breeding season, pairs perform spectacular aerial displays of rolls and dives. The most breathtaking behavior is the "stoop"—a high-altitude, gravity-defying dive where the falcon folds its wings tight against its body, becoming a living missile.
Diet
Peregrines are aerial specialists, feeding almost exclusively on other birds. While they take everything from shorebirds to songbirds, they are famously known as "Duck Hawks." They don't simply "catch" prey; they strike mid-air with clenched talons at such velocity that the impact often kills the target instantly.
Fascinating Fact
To breathe while diving at speeds exceeding 200 mph, Peregrines have evolved small, bony cones called "tubercles" inside their nostrils. These act as baffles to slow the rushing air, preventing the falcon’s lungs from bursting—a biological innovation that inspired the design of modern jet engine intakes!